Add release notes for 5.5 RC2

Document #1929, #1932, #1934, and #1925.

Author: marcphilipp

documentation/src/docs/asciidoc/release-notes/index.adoc

@@ -15,6 +15,8 @@ authors as well as build tool and IDE vendors.
 
 include::../link-attributes.adoc[]
 
+include::release-notes-5.5.0-RC2.adoc[]
+
 include::release-notes-5.5.0-RC1.adoc[]
 
 include::release-notes-5.5.0-M1.adoc[]

documentation/src/docs/asciidoc/release-notes/release-notes-5.5.0-RC2.adoc

@@ -0,0 +1,39 @@
+[[release-notes-5.5.0-RC2]]
+== 5.5.0-RC2
+
+*Date of Release:* June 20, 2019
+
+*Scope:* Feature improvements and bug fixes since RC1
+
+For a complete list of all _closed_ issues and pull requests for this release, consult the
+link:{junit5-repo}+/milestone/41?closed=1+[5.5 RC2] milestone page in the JUnit repository
+on GitHub.
+
+
+[[release-notes-5.5.0-RC2-junit-platform]]
+=== JUnit Platform
+
+No changes.
+
+
+[[release-notes-5.5.0-RC2-junit-jupiter]]
+=== JUnit Jupiter
+
+==== Bug Fixes
+
+* Extensions registered programmatically using `@RegisterExtension` on fields of test
+  classes now work correctly for tests in contained `@Nested` test classes. Previously,
+  such extensions were registered multiple times for each test method in @Nested` classes.
+
+==== New Features and Improvements
+
+* Parameterized tests now support implicit conversion from a `String` to the following
+  `java.time` types for : `Duration`, `Period`, `MonthDay`, `ZoneId`, and `ZoneOffset`.
+* A new `getOrDefault()` convenience method has been added to `ExtensionContext.Store`.
+* The `JRE` enum now supports Java 14.
+
+
+[[release-notes-5.5.0-RC2-junit-vintage]]
+=== JUnit Vintage
+
+No changes.