test: Add (failing) test for handling label clicks

See #20

[ci skip]
fix: Don't double count clicks on labels w/input

See #20
chore: Update built files and examples
Merge branch 'feat.label-clicks'

Conflicts:
	dist/selection-model.js
	dist/selection-model.min.js
	examples/vendor/angular-selection-model/selection-model.js
	examples/vendor/angular-selection-model/selection-model.min.js
	src/scripts/directives/selection-model.js
chore: Bump for release (v0.8.3)
docs: Update changelog