Merge pull request streamlink#2772 from bastimeyer/releases/1.3.1

Release 1.3.1

Merge pull request streamlink#2707 from bastimeyer/releases/1.3.0

Release 1.3.0

Release 1.2.0 (streamlink#2593)

Merge pull request streamlink#2397 from bastimeyer/releases/1.1.1

Release 1.1.1

Merge pull request streamlink#2391 from gravyboat/master

append changelog for 1.1.0 release

Merge pull request streamlink#2199 from cdrage/release-1.0.0

Release 1.0.0

Merge pull request streamlink#1877 from beardypig/release-0.14.2

Release 0.14.2

Release 0.14.0 (streamlink#1855)

Merge pull request streamlink#1757 from beardypig/release-0.13.0-fix

scripts: fix bug in the release for generating the CHANGELOG

Merge pull request streamlink#1644 from cdrage/release-0.12.1

0.12.1 Release