upgrade github-changes to 2.0.2 (was 1.1.1)

motivation: we want to get on newer underscore and lodash because
we keep getting security alerts for them

Author: SethTisue

package.json

@@ -48,7 +48,7 @@
     "devDependencies": {
         "@types/node": "^14.6.4",
         "ajv": "^6.12.4",
-        "github-changes": "^1.1.1",
+        "github-changes": "^2.0.2",
         "npm-run-all": "^4.1.5",
         "rimraf": "^3.0.2",
         "ts-node": "^9.0.0",