Bump up the plugin version to 1.6.6-203 and update release notes (#273)

Author: crdev

build.gradle

@@ -29,7 +29,7 @@ dependencies {
 ext {
     tmpMarkdownInputDir = "${buildDir}/tmp/markdown-inputs".toString()
     htmlOutputDir = "${buildDir}/gen-html".toString()
-    pluginVersion = '1.6.5'
+    pluginVersion = '1.6.6'
 
     // Make sure |ext.pluginSinceBuild| is consistent with |intellij.version|.
     pluginSinceBuild = '203'

releasenotes.md

@@ -1,5 +1,11 @@
 # Release notes
 
+## Release notes for 1.6.6-203
+
+### General
+ * Use the IDE's bundled Kotlin library (fixes #270)
+
+
 ## Release notes for 1.6.5-203
 
 ### General