Release 3.7.0 (DeviceFarmer#802)

* Update version to 3.7.0 in package.json

* Update CHANGELOG.md with version 3.7.0

Update version to 3.6.8 (DeviceFarmer#767)

Update version to 3.6.7 in package.json (DeviceFarmer#762)

Release 3.6.6 (DeviceFarmer#696)

* Release 3.6.6

* Update CHANGELOG.md

Release 3.6.5 (DeviceFarmer#649)

* devicefarmer dependency versions bump

* STF service apk version bump

Downgrade adbkit to 2.11.3 (DeviceFarmer#520)

Downgrade adbkit to 3.2.1 (DeviceFarmer#519)

Release 3.6.1 (DeviceFarmer#209)

Release 3.6.0 (DeviceFarmer#190)

* Update STFService APK to 2.4.6

* Delete .travis.yml

* Update Dockerfile-debian-x86_64

Release 3.5.0