Build infrastructure and typing updates

- Update dependencies
- Use @theintern/dev for building and linting
- Remove unnecessary types
- Update code to support strict checks with tsc
- Simplfy the build configs

Author: jason0x43

.gitignore

@@ -1,5 +1,6 @@
 /src/**/*.js.map
 /src/**/*.js
+/src/**/*.css
 dist
 _build
 /node_modules

.travis.yml

@@ -5,8 +5,4 @@ env:
   global:
   - SAUCE_USERNAME=dojo2-ts-ci
   - SAUCE_ACCESS_KEY=e92610e3-834e-4bec-a3b5-6f7b9d874601
-before_install:
-- npm install -g typings
-before_script:
-- npm install -g grunt-cli
-script: grunt test-ci
+script: npm run ci