Merge pull request select2#5578 from select2/develop

Release Select2 4.0.8

Merge pull request select2#5507 from select2/develop

Release Select2 4.0.7

Merge pull request select2#5494 from select2/develop

Release Select2 4.0.7-rc.0

Merge pull request select2#5488 from select2/develop

Release Select2 4.0.6

update changelog and compile+minify for 4.0.6-rc.1

compile+minify for 4.0.6-rc.0

compile+minify for 4.0.5 release

Compile and minify for 4.0.4 release

Update version identifiers for 4.0.3

Updated version identifiers for 4.0.2