feat: respect exclude setting in JSXElement transform (#215)

BREAKING CHANGE:
* exclude logic is used to exclude JSXElement containing files

fix: force release

BREAKING CHANGE:
* babel 7 requirement

fix: update test fixtures (#212)

* fix: update test fixtures

Fixes #211

* chore: assert exception on use with missing import

fix: update build command and dependencies (#210)

* fix: update build command and dependencies

This commit updates the presets and plugins used in the build-helper
run script to use equivalent v7-packages from the @babel namespace.

* fix: update demo deps and config

Fixes #204

style: sort alphabetically

fix: do not commit package-lock.json

See npm/npm#20603

fix: correct semantic-release usage

fix: use t.clone helper (#151)

fix: update postcss to v6.0.13 (#133)

Tests seem to pass, also tested locally and seems to work fine in a real project

fix: set default handleMissingStyleName option (#129)

The default was not being set for non-namespaced styles.  This caused
a bug where errors were not thrown for runtime style names, since the
options are not passed in if they are only the defaults.