refactor: filter unit tests

Now that our integration tests also use Jest, we need to update our unit
test script to ignore `test/integration`.

Author: jsjoeio

ci/dev/test-unit.sh

@@ -30,7 +30,7 @@ main() {
   # We must keep jest in a sub-directory. See ../../test/package.json for more
   # information. We must also run it from the root otherwise coverage will not
   # include our source files.
-  CS_DISABLE_PLUGINS=true ./test/node_modules/.bin/jest "$@"
+  CS_DISABLE_PLUGINS=true ./test/node_modules/.bin/jest "$@" --testRegex "./test/unit/.*ts" --testPathIgnorePatterns "./test/unit/node/test-plugin"
 }
 
 main "$@"