Release Android v6.0.0-beta.6

[LukasPaczos]

In preparation for release v6.0.0 of the Mapbox Android SDK, we're releasing today the sixth beta in the 6.0.x series. The 6.x release brings major features as:

• Heatmap support
• Refreshed gestures handling
• Expressions
• HillshadeLayer and RasterDemSource
• CustomGeometrySource
• ViewportCollision detection
• Transparent TextureView

Please note that this is a pre-release version intended to gather early feedback on the new APIs and to detect any potential issues (you can report them here). This release is not intended for production apps.

Changes since v6.0.0-beta.5

• Fix race condition crash for heavily modified annotations #11551
• Throw exception when converting PropertyValue with an expression #11572
• Invalidate camera position before delivering onMapReady #11585
• Rework logical condition convenience expressions #11555
• Telemetry library version update to 3.0.0-beta.4 #11590

Todo

• Create release branch
• Change CircleCI config to build from release branch (android-release-all->deploy)
• Change version name to 6.0.0-beta.6 in /platform/android/MapboxGLAndroidSDK/gradle.properties
• Publish 6.0.0-beta.6 artifact to Maven Central
• Tag android-v6.0.0-beta.6
• Change version name to 6.0.0-SNAPSHOT in /platform/android/MapboxGLAndroidSDK/gradle.properties
• Change CircleCI config to build back from release branch
• Merge release-android-v6.0.0-beta.6 back into release-boba
• Update Javadoc documentation via release branch, not master @langsmith
• Create new Fabric release @langsmith

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/cc @mapbox/mobile @mapbox/support @colleenmcginnis

[langsmith]

🎉🎊