Support Electron v13-14 and Node v16 (#358)

* Support Electron 13 and 14

* Support Node 16

* Drop support for unsupported target versions

https://nodejs.org/en/about/releases/
Currently supported versions of Node.js: v12 through v16

https://www.electronjs.org/docs/tutorial/support
Currently supported versions of Electron: v12, v13, and v14

* Update nan

* Fix EOL

package.json

@@ -68,25 +68,25 @@
   },
   "devDependencies": {
     "@types/node": "^7.0.62",
+    "eslint": "^7.28.0",
+    "eslint-config-prettier": "^8.3.0",
+    "eslint-plugin-only-warn": "^1.0.2",
+    "eslint-plugin-prettier": "^3.4.0",
     "fs-extra": "^9.0.1",
+    "gh-pages": "^3.2.0",
+    "htmlhint": "^0.15.1",
+    "husky": "^6.0.0",
     "jest": "^26.6.3",
+    "lint-staged": "^11.0.0",
     "minimist": "^1.2.5",
-    "nan": "^2.13.2",
+    "nan": "^2.15.0",
     "node-abi": "^2.19.3",
     "node-gyp": "^7.1.2",
     "prebuild": "^10.0.1",
+    "prettier": "^2.3.1",
     "robotjs": "^0.6.0",
     "tar": "^6.0.5",
-    "gh-pages": "^3.2.0",
-    "vuepress": "^1.7.1",
-    "eslint": "^7.28.0",
-    "eslint-config-prettier": "^8.3.0",
-    "eslint-plugin-only-warn": "^1.0.2",
-    "eslint-plugin-prettier": "^3.4.0",
-    "htmlhint": "^0.15.1",
-    "husky": "^6.0.0",
-    "lint-staged": "^11.0.0",
-    "prettier": "^2.3.1"
+    "vuepress": "^1.7.1"
   },
   "supportedTargets": [
     [
@@ -134,6 +134,16 @@
       "12.0.0",
       "87"
     ],
+    [
+      "electron",
+      "13.0.0",
+      "89"
+    ],
+    [
+      "electron",
+      "14.0.0",
+      "89"
+    ],
     [
       "node",
       "10.0.0",
@@ -163,6 +173,12 @@
       "node",
       "15.0.0",
       "88"
+    ],
+    [
+      "node",
+      "16.0.0",
+      "93"
     ]
   ]
 }
+