Fixes #19 Bump dependencies & update octokit usage

package.json

@@ -23,19 +23,19 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.0.0",
-    "@actions/github": "^1.0.0",
-    "@types/glob": "^7.1.1",
-    "@types/node": "^12.0.4",
+    "@actions/core": "^1.2.4",
+    "@actions/github": "^4.0.0",
     "add": "^2.0.6",
     "glob": "^7.1.4",
     "global": "^4.4.0"
   },
   "devDependencies": {
-    "@types/jest": "^25.1.4",
-    "jest": "^25.1.0",
-    "jest-circus": "^25.1.0",
-    "ts-jest": "^25.2.1",
-    "typescript": "^3.7.3"
+    "@types/glob": "^7.1.1",
+    "@types/node": "^12.0.4",
+    "@types/jest": "^26.0.5",
+    "jest": "^26.1.0",
+    "jest-circus": "^26.1.0",
+    "ts-jest": "^26.1.3",
+    "typescript": "^3.9.7"
   }
 }