Release Name: 2.6.2

Notes:
== Rubygame 2.6.2

Release focus: Bug fixes.

=== Fixes

- Fixed: Rubygame::Screen.set_mode and Rubygame::Screen.instance were
  accidently lost during the FFI port. (Note: those methods are
  deprecated, but kept for backwards compatibility. New code should
  use Rubygame::Screen.new or Rubygame::Screen.open instead.)


Changes: