Merge branch 'master' into gh-pages

* master:
  docs: update docs, adding destroy, exclude, and excludeClass
  feat(exclude): add exclude option; change clickableClass to excludeClass
  Update rollup-plugin-typescript2 to the latest version 🚀 (#412)
  Update puppeteer to the latest version 🚀 (#409)
  chore(deps): upgrade packages
  Update concurrently to the latest version 🚀 (#405)
  test(destroy): add test for new destroy method
  feat: add a destroy method (#404)
  chore(deps): upgrade packages
  fix(handleup): remove pointer regardless of isPanning state
  build(demo): add task for building the demo for gh-pages
  fix(css): fix border width retrieval in Firefox
  refactor(panzoom): be specific about panzoom event names
  chore(package): update rollup-plugin-typescript2 to version 0.24.0 (#401)
  chore(package): update rollup-plugin-typescript2 to version 0.23.0 (#400)
  chore(deps): upgrade packages
  docs(zoomtopoint): the point is more like from the element's parent
  docs(readme): regenerate source URLs for docs

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 node_js:
   - "10"
-  - "12"
+  - "13"
 deploy:
   provider: npm
   email: [email protected]