Update README.md

Update README.md

Merge pull request flairNLP#767 from zalandoresearch/flairNLPGH-563-f…

…lair-0.4.2-release-prep

flairNLPGH-563: prepare 0.4.2 release

flairNLPGH-556: increment Flair version number

flairNLPGH-316: explanations

flairNLPGH-205: bump version number

flairNLPGH-165: bump Flair version number

Merge pull request flairNLP#145 from zalandoresearch/release-0.3

Release 0.3

Merge pull request flairNLP#46 from zalandoresearch/flairNLPGH-23-ret…

…agging-error

flairNLPGH-23: retagging error

Merge pull request flairNLP#6 from zalandoresearch/v0.1

V0.1