Upgrade dependencies, eslint

Author: ivome

.eslintrc

@@ -1,12 +1,13 @@
 {
-    "parser": "typescript-eslint-parser",
+    "parser": "@typescript-eslint/parser",
 
     "plugins": [
-        "typescript"
+        "@typescript-eslint"
     ],
 
     "extends": [
-        "eslint:recommended"
+        "eslint:recommended",
+        "plugin:@typescript-eslint/recommended"
     ],
 
     "env": {
@@ -187,7 +188,7 @@
         "no-unneeded-ternary": 2,
         "no-unreachable": 2,
         "no-unused-expressions": 2,
-        "typescript/no-unused-vars": 2,
+        "no-unused-vars": 2,
         "no-use-before-define": 0,
         "no-useless-call": 2,
         "no-var": 2,

package.json

@@ -39,19 +39,19 @@
   "author": "Ivo Meißner",
   "license": "MIT",
   "devDependencies": {
-    "@types/assert": "^0.0.31",
-    "@types/chai": "^4.1.4",
+    "@types/assert": "^1.4.6",
+    "@types/chai": "^4.2.11",
     "@types/graphql": "^0.13.0 || ^14.0.0",
-    "@types/lodash.get": "^4.4.4",
-    "@types/mocha": "^5.2.5",
-    "chai": "^4.1.0",
-    "eslint": "^5.4.0",
-    "eslint-plugin-typescript": "^0.12.0",
+    "@types/lodash.get": "^4.4.6",
+    "@types/mocha": "^7.0.2",
+    "@typescript-eslint/eslint-plugin": "^2.27.0",
+    "@typescript-eslint/parser": "^2.27.0",
+    "chai": "^4.2.0",
+    "eslint": "^6.8.0",
     "graphql": "^0.13.0 || ^14.0.0",
-    "mocha": "^5.2.0",
-    "rimraf": "^2.6.1",
-    "ts-node": "^7.0.1",
-    "typescript": "^3.0.1",
-    "typescript-eslint-parser": "^18.0.0"
+    "mocha": "^7.1.1",
+    "rimraf": "^3.0.2",
+    "ts-node": "^8.8.2",
+    "typescript": "^3.8.3"
   }
 }