chore(*): move to let/const

Author: SimonSchick

.eslintrc

@@ -1,15 +1,22 @@
 {
   "extends": [
-    "prettier"
+    "prettier",
+    "eslint:recommended"
   ],
-      "parserOptions": {
-        "ecmaVersion": 2017,
-      },
+  "parserOptions": {
+    "ecmaVersion": 2017
+  },
   "plugins": [
-      "markdown",
-      "async-await"
+    "markdown",
+    "async-await"
   ],
   "env": {
     "node": true
+  },
+  "rules": {
+    "prefer-const": "error",
+    "no-var": "error",
+    "no-use-before-define": "error",
+    "strict": ["error", "global"]
   }
 }

.travis.yml

@@ -24,10 +24,8 @@ notifications:
   email: false
 
 script:
-  - nvm ls-remote
   - docker run -d -e MYSQL_ALLOW_EMPTY_PASSWORD=1 -e MYSQL_DATABASE=test -p 33306:3306 mysql:5.7
   - MYSQL_PORT=33306 node tools/wait-up.js
-  - node --version
   - yarn --version
   - if [ "$LINT" = "1" ]; then yarn run lint; fi
   - MYSQL_PORT=33306 yarn run test:raw

appveyor.yml

@@ -32,8 +32,6 @@ before_test:
 
 test_script:
   - mysql --version
-  - node --version
-  - yarn --version
   - if "%LINT%"=="1" (yarn run lint)
   - node test/run.js
   - SET MYSQL_USE_COMPRESSION=1

benchmarks/.eslintrc

@@ -0,0 +1,5 @@
+{
+    "rules": {
+        "no-console": "off"
+    }
+}