v0.0.4-13

Review by @matthieubosquet

Add codecov integration to GitHub action
Publish package to NPM from GitHub action
Encode/decode SPARQL properly when adding to URL fragment
Use TypeScript linting and fix warnings
Demo webroot is only in /docs
Add blank text to literals in toolbox
Extract alias types
Validate LANGTAG in langString
Add description to lib package
Remove unused dependency from lib package