build(deps-dev): upgrade eslint to ^7.2.0 & @typescript-eslint/* to ^3.2.0 (#104)

* build(deps-dev): upgrade eslint to ^7.2.0
* build(deps-dev): upgrade @typescript-eslint/* to ^3.2.0

Author: malept

package.json

@@ -40,10 +40,10 @@
     "@types/yauzl": "^2.9.1"
   },
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "^2.25.0",
-    "@typescript-eslint/parser": "^2.25.0",
+    "@typescript-eslint/eslint-plugin": "^3.2.0",
+    "@typescript-eslint/parser": "^3.2.0",
     "ava": "^3.5.1",
-    "eslint": "^6.8.0",
+    "eslint": "^7.2.0",
     "eslint-config-standard": "^14.1.1",
     "eslint-plugin-ava": "^10.2.0",
     "eslint-plugin-import": "^2.20.1",