Upgrade dependencies

Author: neet

package.json

@@ -20,19 +20,19 @@
     "vscode": "^1.27.0"
   },
   "dependencies": {
-    "@types/chai": "^4.1.7",
-    "@types/mocha": "^5.2.5",
-    "@types/node": "^11.12.0",
+    "@types/chai": "^4.2.12",
+    "@types/mocha": "^8.0.1",
+    "@types/node": "^14.0.27",
     "chai": "^4.2.0",
-    "core-js": "^3.0.0",
-    "mocha": "^6.0.2",
+    "core-js": "^3.6.5",
+    "mocha": "^8.1.1",
     "npm-run-all": "^4.1.5",
     "qiita-js-2": "^1.3.1",
-    "tslint": "^5.8.0",
-    "typescript": "^3.1.6",
-    "vscode": "^1.1.6",
-    "vscode-nls": "^4.0.0",
-    "vscode-nls-dev": "^3.2.3"
+    "tslint": "^6.1.3",
+    "typescript": "^3.9.7",
+    "vscode": "^1.1.37",
+    "vscode-nls": "^4.1.2",
+    "vscode-nls-dev": "^3.3.2"
   },
   "activationEvents": [
     "onView:qiitaItems",