LitElement conversion part 1: cleanup

[web-padawan]

README.md

Align with skeleton:

• remove mentions of Bower and HTML Imports

• align and move badges below the description

• add pre-release note before the code snippet

  • mention Vaadin 14 compatible branches (example)

• update "Running demos and API docs in a browser" section

• update "Running tests from the command line" section

• update "Following the coding style" section

vaadin-directory-description.md

• align badges with README, remove Bower badge

• check that code snippet and image look good

package.json

1. Update package.json to align with package.json:

• update vaadin-component-dev-dependencies version

• update main entry to point to a single .js file

• add module entry which should be the same as main

• add "dependencies" based on Bower dependencies

• update "files" section to include d.ts etc

• update "scripts" section. Note the analyze script

2. Remove bower.json file.

Hint: commit with --no-verify flag to bypass Git hooks.

Config files

1. Update the files to align with skeleton:

• .eslintrc.json
• .gitignore
• .travis.yml

2. Copy the following files from skeleton:

• babel.config.js
• .prettierrc
• tsconfig.json (update the "include" section)

Cleanup

1. Remove demo folder completely

2. Remove wct.conf.js file

3. Remove test/.eslintrc.json file

4. Remove test/test-suites.js file

5. Remove test/index.html file

[web-padawan]

Done by #138