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.

codecov.yml

@@ -0,0 +1,20 @@
+codecov:
+  require_ci_to_pass: yes
+
+coverage:
+  precision: 2
+  round: down
+  range: "70...100"
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment:
+  layout: "reach,diff,flags,tree"
+  behavior: default
+  require_changes: no