Prepare 0.2.0 release

Author: pinepain

README.md

@@ -8,6 +8,11 @@ PHP extension for V8 JavaScript engine
 
 **This extension is still under heavy development and its public API may change without any warning. Use at your own risk.**
 
+### PLEASE READ:
+
+Maintaining this project takes significant amount of time and efforts.
+If you like my work and want to show your appreciation, please consider supporting me at https://www.patreon.com/pinepain.
+
 ## Why (aka Rationale)
 
 This tool solves following domain problems: