Add CHANGELOG.md

Author: Abduqodiri Qurbonzoda

CHANGELOG.md

@@ -0,0 +1,11 @@
+# CHANGELOG
+
+## 0.3.0
+
+- Require the minimum Kotlin version of 1.4.30
+- Require the minimum Gradle version of 6.8
+- Change runtime artifact id from `kotlinx.benchmark.runtime` to `kotlinx-benchmark-runtime`
+- Publish runtime to Maven Central instead of Bintray [#33](https://github.com/Kotlin/kotlinx-benchmark/issues/33)
+- Change plugin id from `kotlinx.benchmark` to `org.jetbrains.kotlinx.benchmark`
+- Change plugin artifact id from `kotlinx.benchmark.gradle` to `kotlinx-benchmark-plugin`
+- Publish plugin to Gradle Plugin Portal instead of Bintray