build(deps): bump io.reactivex.rxjava2:rxjava from 2.1.14 to 2.2.21 (#7344)

Bumps [io.reactivex.rxjava2:rxjava](https://github.com/ReactiveX/RxJava)
from 2.1.14 to 2.2.21.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ReactiveX/RxJava/releases">io.reactivex.rxjava2:rxjava's
releases</a>.</em></p>
<blockquote>
<h2>2.2.21</h2>
<p><a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.21%7C">Maven</a>
<a href="http://reactivex.io/RxJava/2.x/javadoc/2.2.21">JavaDocs</a></p>
<p>:warning: This is the last planned update for the 2.x version line.
After <strong>February 28, 2021</strong>, 2.x becomes
<strong>End-of-Life</strong> (EoL); no further patches, bugfixes,
enhancements, documentation or support will be provided by the
project.</p>
<h4>Enhancements</h4>
<ul>
<li>Add a system parameter to allow scheduled worker release in the Io
<code>Scheduler</code>. (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7162">#7162</a>)</li>
<li>Add a system parameter to allow <code>Scheduler</code>s to use
<code>System.nanoTime()</code> for <code>now()</code>. (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7170">#7170</a>)</li>
</ul>
<h2>2.2.20</h2>
<p><a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.20%7C">Maven</a>
<a href="http://reactivex.io/RxJava/2.x/javadoc/2.2.20">JavaDocs</a></p>
<p>:warning: The 2.x version line is now in <strong>maintenance
mode</strong> and will be supported only through bugfixes until
<strong>February 28, 2021</strong>. No new features, behavior changes or
documentation adjustments will be accepted or applied to 2.x. It is
recommended to migrate to <a
href="https://github.com/ReactiveX/RxJava/tree/3.x">3.x</a> within this
time period.</p>
<h4>Bugfixes</h4>
<ul>
<li>Fix <code>Observable.flatMap</code> with <code>maxConcurrency</code>
hangs (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/6960">#6960</a>)</li>
<li>Fix <code>Observable.toFlowable(ERROR)</code> not cancelling upon
<code>MissingBackpressureException</code> (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7084">#7084</a>)</li>
<li>Fix <code>Flowable.concatMap</code> backpressure with scalars. (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7091">#7091</a>)</li>
</ul>
<h2>2.2.19</h2>
<p><a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.19%7C">Maven</a>
<a href="http://reactivex.io/RxJava/2.x/javadoc/2.2.19">JavaDocs</a></p>
<p>:warning: The 2.x version line is now in <strong>maintenance
mode</strong> and will be supported only through bugfixes until
<strong>February 28, 2021</strong>. No new features, behavior changes or
documentation adjustments will be accepted or applied to 2.x. It is
recommended to migrate to <a
href="https://github.com/ReactiveX/RxJava/tree/3.x">3.x</a> within this
time period.</p>
<h4>Bugfixes</h4>
<ul>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/7980c85b18dd46ec2cd2cf49477363f1268d3a98">Commit
7980c85b</a>: Fix <code>switchMap</code> not canceling properly during
<code>onNext</code>-<code>cancel</code> races.</li>
</ul>
<h2>2.2.18</h2>
<p><a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.18%7C">Maven</a></p>
<p>:warning: The 2.x version line is now in <strong>maintenance
mode</strong> and will be supported only through bugfixes until
<strong>February 28, 2021</strong>. No new features, behavior changes or
documentation adjustments will be accepted or applied to 2.x. It is
recommended to migrate to <a
href="https://github.com/ReactiveX/RxJava/tree/3.x">3.x</a> within this
time period.</p>
<h4>Bugfixes</h4>
<ul>
<li><a
href="https://redirect.github.com/ReactiveX/RxJava/pull/6894">Pull
6894</a>: Fix <code>groupBy</code> not requesting more if a group is
cancelled with buffered items.</li>
</ul>
<h2>2.2.17</h2>
<p><a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.17%7C">Maven</a></p>
<h4>Bugfixes</h4>
<ul>
<li><a
href="https://redirect.github.com/ReactiveX/RxJava/pull/6827">Pull
6827</a>: Fix <code>Flowable.flatMap</code> not canceling the inner
sources on outer error.</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/ReactiveX/RxJava/blob/v2.2.21/CHANGES.md">io.reactivex.rxjava2:rxjava's
changelog</a>.</em></p>
<blockquote>
<h3>Version 2.2.21 - February 10, 2021 (<a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.21%7C">Maven</a>)</h3>
<p><a
href="http://reactivex.io/RxJava/2.x/javadoc/2.2.21">JavaDocs</a></p>
<p>:warning: This is the last planned update for the 2.x version line.
After <strong>February 28, 2021</strong>, 2.x becomes
<strong>End-of-Life</strong> (EoL); no further patches, bugfixes,
enhancements, documentation or support will be provided by the
project.</p>
<h4>Enhancements</h4>
<ul>
<li>Add a system parameter to allow scheduled worker release in the Io
<code>Scheduler</code>. (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7162">#7162</a>)</li>
<li>Add a system parameter to allow <code>Scheduler</code>s to use
<code>System.nanoTime()</code> for <code>now()</code>. (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7170">#7170</a>)</li>
</ul>
<h3>Version 2.2.20 - October 6, 2020 (<a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.20%7C">Maven</a>)</h3>
<p><a
href="http://reactivex.io/RxJava/2.x/javadoc/2.2.20">JavaDocs</a></p>
<p>:warning: The 2.x version line is now in <strong>maintenance
mode</strong> and will be supported only through bugfixes until
<strong>February 28, 2021</strong>. No new features, behavior changes or
documentation adjustments will be accepted or applied to 2.x. It is
recommended to migrate to <a
href="https://github.com/ReactiveX/RxJava/tree/3.x">3.x</a> within this
time period.</p>
<h4>Bugfixes</h4>
<ul>
<li>Fix <code>Observable.flatMap</code> with <code>maxConcurrency</code>
hangs (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/6960">#6960</a>)</li>
<li>Fix <code>Observable.toFlowable(ERROR)</code> not cancelling upon
<code>MissingBackpressureException</code> (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7084">#7084</a>)</li>
<li>Fix <code>Flowable.concatMap</code> backpressure with scalars. (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7091">#7091</a>)</li>
</ul>
<h3>Version 2.2.19 - March 14, 2020 (<a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.19%7C">Maven</a>)</h3>
<p><a
href="http://reactivex.io/RxJava/2.x/javadoc/2.2.19">JavaDocs</a></p>
<p>:warning: The 2.x version line is now in <strong>maintenance
mode</strong> and will be supported only through bugfixes until
<strong>February 28, 2021</strong>. No new features, behavior changes or
documentation adjustments will be accepted or applied to 2.x. It is
recommended to migrate to <a
href="https://github.com/ReactiveX/RxJava/tree/3.x">3.x</a> within this
time period.</p>
<h4>Bugfixes</h4>
<ul>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/7980c85b18dd46ec2cd2cf49477363f1268d3a98">Commit
7980c85b</a>: Fix <code>switchMap</code> not canceling properly during
<code>onNext</code>-<code>cancel</code> races.</li>
</ul>
<h3>Version 2.2.18 - February 21, 2020 (<a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.18%7C">Maven</a>)</h3>
<p>:warning: The 2.x version line is now in <strong>maintenance
mode</strong> and will be supported only through bugfixes until
<strong>February 28, 2021</strong>. No new features, behavior changes or
documentation adjustments will be accepted or applied to 2.x. It is
recommended to migrate to <a
href="https://github.com/ReactiveX/RxJava/tree/3.x">3.x</a> within this
time period.</p>
<h4>Bugfixes</h4>
<ul>
<li><a
href="https://redirect.github.com/ReactiveX/RxJava/pull/6894">Pull
6894</a>: Fix <code>groupBy</code> not requesting more if a group is
cancelled with buffered items.</li>
</ul>
<h3>Version 2.2.17 - January 12, 2020 (<a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.17%7C">Maven</a>)</h3>
<h4>Bugfixes</h4>
<ul>
<li><a
href="https://redirect.github.com/ReactiveX/RxJava/pull/6827">Pull
6827</a>: Fix <code>Flowable.flatMap</code> not canceling the inner
sources on outer error.</li>
</ul>
<h3>Version 2.2.16 - December 15, 2019 (<a
href="http://search.maven.org/#artifactdetails%7Cio.reactivex.rxjava2%7Crxjava%7C2.2.16%7C">Maven</a>)</h3>
<h4>Bugfixes</h4>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/725ea89629568301ab7d9b21cafdf8c648a14da9"><code>725ea89</code></a>
Update CHANGES.md</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/776f0e55d97432799def8927c0e770154500686b"><code>776f0e5</code></a>
2.x: Introduce property rx2.scheduler.use-nanotime (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7154">#7154</a>)
(<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7170">#7170</a>)</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/f31aed36fd9d47edf0177164c54c64d4dc28c818"><code>f31aed3</code></a>
Support for scheduled release of threads in Io Scheduler (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7162">#7162</a>)</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/947b05fb9d44de2231aa148ef2eb3a6edc07fcfd"><code>947b05f</code></a>
Release 2.2.20</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/3d6403be8d9ada65016762a6bec417e268f482e3"><code>3d6403b</code></a>
2.x: Fix Flowable.concatMap backpressure w/ scalars (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7091">#7091</a>)</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/b13a45e161f37c927e99d8def5f156834a83befb"><code>b13a45e</code></a>
2.x: Fix toFlowable(ERROR) not cancelling upon MBE (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/7084">#7084</a>)</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/2cb20bd41efe70556ef7d346ee60f70e20548bae"><code>2cb20bd</code></a>
2.x: Fix Observable.flatMap with maxConcurrency hangs (<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/6947">#6947</a>)
(<a
href="https://redirect.github.com/ReactiveX/RxJava/issues/6960">#6960</a>)</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/7ca43c7398810ee87c57f7f2165104822c0a4662"><code>7ca43c7</code></a>
Update CHANGES.md</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/7980c85b18dd46ec2cd2cf49477363f1268d3a98"><code>7980c85</code></a>
2.x: Fix switchMap not canceling properly during onNext-cancel
races</li>
<li><a
href="https://github.com/ReactiveX/RxJava/commit/e2b7816f2bcf89491cad68cb35a9e36368a29d97"><code>e2b7816</code></a>
Release 2.2.18</li>
<li>Additional commits viewable in <a
href="https://github.com/ReactiveX/RxJava/compare/v2.1.14...v2.2.21">compare
view</a></li>
</ul>
</details>
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gradle/libs.versions.toml

@@ -67,7 +67,7 @@ reactiveStreams = "1.0.4"
 robolectric = "4.12"            # Do not use >4.12 as it breaks the build
 runner = "1.0.2"
 rxandroid = "2.0.2"
-rxjava = "2.1.14"
+rxjava = "2.2.21"
 serialization = "1.7.3"
 slf4jNop = "2.0.17"
 spotless = "7.0.4"