Merge branch 'fix/max-subtract-fee' into 'master'

fix(app): MAX does not subtract fee

See merge request papers/airgap/airgap-wallet!217

Merge branch 'fix/android-version' into 'master'

fix(android): use api level 28

See merge request papers/airgap/airgap-wallet!216

Merge branch 'chore/update-coin-lib' into 'master'

chore(): updated airgap-coin-lib version

See merge request papers/airgap/airgap-wallet!203

Merge branch 'chore/update-coin-lib' into 'master'

chore(): updated airgap-coin-lib version

See merge request papers/airgap/airgap-wallet!202

Merge branch 'fix/android-chrome-issue' into 'master'

fix(android-chrome-issue): added polyfill for stream objects

See merge request papers/airgap/airgap-wallet!198

Merge branch 'feat/chart-ionic-4' into 'master'

Feat/chart ionic 4

See merge request papers/airgap/airgap-wallet!184

Merge branch 'release/v2.7.1' into 'master'

Release/v2.7.1

See merge request papers/airgap/airgap-wallet!190

Merge branch 'feat/ios-specific-screenshots' into 'master'

feat(ios): add ios specific screenshots

See merge request papers/airgap/airgap-wallet!183

Merge branch 'ionic-4-improvements' into 'master'

fix(app): removes round border on iOS after 4.4 update

See merge request papers/airgap/airgap-wallet!154

Merge branch 'ae-voting-translations' into 'master'

feat(voting): chinese translations

See merge request papers/airgap/airgap-wallet!139