test: drop end of life Node.js version

* test: Dropped Node v13.x since it's now past it's expiration.
* test: Migrated from Travis CI to GitHub Actions.
* test: Migrated from Coveralls to CodeCov.
* docs: Dropped over 1.x stuff from the read me.
* perf: Updated dependencies and rebuilt against latest TypeScript.
* feat: Bumped major version number due to Node.js support changing.

jest.config.js

@@ -1,4 +1,5 @@
 module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
-};
+  coverageReporters: ['lcov'],
+};