feat: upgrade plugin to v2.3.3

BREAKING CHANGE: add @typescript-eslint/no-unnecessary-condition

Closes #154.

package.json

@@ -55,7 +55,7 @@
     "TypeScript"
   ],
   "dependencies": {
-    "@typescript-eslint/parser": "^2.2.0",
+    "@typescript-eslint/parser": "^2.3.3",
     "eslint-config-standard": "^14.1.0"
   },
   "peerDependencies": {
@@ -71,7 +71,7 @@
     "@commitlint/config-conventional": "^8.2.0",
     "@commitlint/travis-cli": "^8.2.0",
     "@types/node": "^12.12.11",
-    "@typescript-eslint/eslint-plugin": "^2.2.0",
+    "@typescript-eslint/eslint-plugin": "^2.3.3",
     "ava": "^2.4.0",
     "editorconfig-checker": "^3.0.3",
     "eslint": "^6.6.0",

src/index.test.ts

@@ -70,6 +70,7 @@ test('export', (t): void => {
           '@typescript-eslint/no-namespace': 'error',
           '@typescript-eslint/no-non-null-assertion': 'error',
           '@typescript-eslint/no-this-alias': ['error', { allowDestructuring: true }],
+          '@typescript-eslint/no-unnecessary-condition': 'error',
           '@typescript-eslint/no-unnecessary-type-assertion': 'error',
           '@typescript-eslint/no-unused-vars': ['error', { vars: 'all', args: 'none', ignoreRestSiblings: true }],
           '@typescript-eslint/no-use-before-define': ['error', { functions: false, classes: false, variables: false, typedefs: false }],

src/index.ts

@@ -75,6 +75,7 @@ export = {
         '@typescript-eslint/no-namespace': 'error',
         '@typescript-eslint/no-non-null-assertion': 'error',
         '@typescript-eslint/no-this-alias': ['error', { allowDestructuring: true }],
+        '@typescript-eslint/no-unnecessary-condition': 'error',
         '@typescript-eslint/no-unnecessary-type-assertion': 'error',
         '@typescript-eslint/no-var-requires': 'error',
         '@typescript-eslint/prefer-function-type': 'error',