update dependencies (#96)

* Bump @actions/core from 1.3.0 to 1.6.0

* Bump @actions/github from 4.0.0 to 5.0.0

* Bump @octokit/rest from 18.5.6 to 18.12.0

* Bump strip-ansi from 6.0.0 to 6.0.1

package.json

@@ -26,11 +26,11 @@
   "author": "Naoki Oketani <okepy.naoki@gmail.com>",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.2.6",
-    "@actions/github": "^4.0.0",
-    "@octokit/rest": "^18.0.12",
+    "@actions/core": "^1.6.0",
+    "@actions/github": "^5.0.0",
+    "@octokit/rest": "^18.12.0",
     "axios": "^0.21.2",
-    "strip-ansi": "^6.0.0"
+    "strip-ansi": "^6.0.1"
   },
   "devDependencies": {
     "@types/jest": "^27.0.2",