Update dependencies

[Vidminas]

• Ran npm audit fix, to fix security vulnerabilities:

Running npm install would give this warning:

$ npm install
audited 615 packages in 1.491s
found 12 high severity vulnerabilities
  run `npm audit fix` to fix them, or `npm audit` for details

This updated lodash from 4.17.11 to 4.17.15.

• Added missing dependencies:
  • jsonc-parser
  • vscode-nls

Both of these were already included as dependencies in other packages,
but without explicit mention in package.json, the installServerIntoExtension script didn't pick up on them.

• Updated dependencies (only for minor and non-breaking changes) to get their newest bug fixes:

  • vscode-json-languageservice from 3.2.0 to 3.3.0
  • vscode-uri from 2.0.2 to 2.0.3
  • prettier from 1.17.1 to 1.18.2
  • @types/prettier from 1.13.2 to 1.18.0
  • coveralls from 3.0.3 to 3.0.5
  • source-map-support from 0.5.4 to 0.5.12
  • tslint from 5.17.0 to 5.18.0
  • typescript-tslint-plugin from 0.4.0 to 0.5.4
  • typescript from 3.5.1 to 3.5.3

• Dependencies left not updated:

  • @types/mocha is 2.2.48, newest is 5.2.7 (should be updated with mocha)
  • mocha is 5.0.4, newest is 6.2.0 (has breaking changes)
  • @types/node is 9.6.6, newest is 12.6.8 (unsure if useful)

[coveralls]

Coverage decreased (-0.5%) to 65.84% when pulling 85d69bc on Vidminas:deps-update into 4aff48d on redhat-developer:master.