Release version 1.0

I hope the plugin is ready for production use. There is room for
improvement on the points listed in the restrictions, but at least
the plugin should not replace valid code with invalid code.
Let's try the plugin! Please report any bugs you find.

addons/gdscript_preprocessor/plugin.cfg

@@ -3,5 +3,5 @@
 name="GDScript Preprocessor"
 description="An export plugin for stripping comments and \"conditional compilation\" of GDScript."
 author="Danil Alexeev"
-version="1.0-dev"
+version="1.0"
 script="plugin.gd"