popcorn: bump version to 0.3.0 (#607)

Generator PR dropped dev and build tasks which are needed
for building landing page.

Author: jgonet

popcorn/elixir/mix.exs

@@ -1,7 +1,7 @@
 defmodule Popcorn.MixProject do
   use Mix.Project
 
-  @version "0.3.0-rc4"
+  @version "0.3.0"
   @github "https://github.com/software-mansion/popcorn"
   @repo_root "../.."
   @package_metadata_files ~w(README.md LICENSE)

popcorn/js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@swmansion/popcorn",
-  "version": "0.3.0-rc4",
+  "version": "0.3.0",
   "description": "JS bindings for Popcorn",
   "type": "module",
   "license": "Apache-2.0",