bump version to 0.2.2

Merge pull request imaNNeo#66 from imaNNeoFighT/hotfix/touch-response…

…-null

Hotfix/touch response null

Merge pull request imaNNeo#60 from imaNNeoFighT/bugfix/loop

Bugfix/loop

Merge pull request imaNNeo#57 from imaNNeoFighT/feature/tap

Feature/tap

upgraded version to 0.1.5

Merge pull request imaNNeo#44 from imaNNeoFighT/bugfix/barchart/low-y…

…-in-large-scale

Bugfix barchart draw when y is low in large scale y values

Merge pull request imaNNeo#42 from imaNNeoFighT/feature/both-axis-titles

Feature/around-titles

Merge pull request imaNNeo#34 from imaNNeoFighT/improvement/prevent-o…

…vershooting

Improvement/prevent overshooting

Merge pull request imaNNeo#30 from imaNNeoFighT/feature/interactivity

Feature/interactivity

Merge pull request imaNNeo#30 from imaNNeoFighT/feature/interactivity

Feature/interactivity