Add identity common items for new functionality (#1027)

* moving common auth items to identity.ts and fixing UserRecord definitions * fixing copyright year and exporting old artifacts * adding in common files only * breaking out parsing functions and adding a bunch of tests * clean up & formatter * adding jsdoc comments * cleaning up update mask and adding more tests * fixing projectId references * changing classes to interfaces, adding in a key cache, and more tests * formatter * decoupling decode & verify * added tests for setting the expiration time * cleaning up var names * adding in retry for key verification * format * address comments * add package-lock * change decoded JWT to decoded payload

Author: colerogers

package-lock.json

@@ -157,7 +157,8 @@
  "@types/express": "4.17.3",
  "cors": "^2.8.5",
  "express": "^4.17.1",
- "lodash": "^4.17.14"
+ "lodash": "^4.17.14",
+ "node-fetch": "^2.6.7"
  },
  "devDependencies": {
  "@types/chai": "^4.1.7",
@@ -168,6 +169,7 @@
  "@types/mock-require": "^2.0.0",
  "@types/nock": "^10.0.3",
  "@types/node": "^8.10.50",
+ "@types/node-fetch": "^3.0.3",
  "@types/sinon": "^7.0.13",
  "chai": "^4.2.0",
  "chai-as-promised": "^7.1.1",