Implement JWT Bearer grant

Author: ericleib

package-lock.json

@@ -38,6 +38,7 @@
     "@curveball/core": "^0.21.1",
     "@curveball/http-errors": "^0.5.0",
     "@types/chai": "^4.3.1",
+    "@types/jsonwebtoken": "^9.0.6",
     "@types/mocha": "^10.0.0",
     "@types/node": "^18.0.0",
     "@typescript-eslint/eslint-plugin": "^6.2.0",
@@ -72,5 +73,8 @@
       "tsx"
     ],
     "exit": true
+  },
+  "dependencies": {
+    "jsonwebtoken": "^9.0.2"
   }
 }