chore(release): publish packages

- thermion_dart@0.2.1-dev.0.0.15
 - thermion_flutter@0.2.1-dev.15
 - thermion_flutter_web@0.2.0+6
 - thermion_flutter_platform_interface@0.2.1-dev.15
 - thermion_flutter_ffi@0.2.1-dev.15

thermion_dart/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.2.1-dev.0.0.15
+
+ - **FIX**: remove superfluous ceil() calls for picking coordinates.
+ - **FEAT**: expose zoomSensitivity argument for flight input handler.
+
 ## 0.2.1-dev.0.0.14
 
  - **FIX**: reduce size of pick functor for compatibility with armeabi-v7a.