chore: upgrade eslint java version to 2018

Author: manast

.eslintrc.yml

@@ -2,7 +2,7 @@ env:
   node: true
 
 parserOptions:
-  ecmaVersion: 8
+  ecmaVersion: 2018
 
 extends:
   - eslint:recommended
@@ -38,4 +38,4 @@ rules:
   mocha/no-sibling-hooks: 0
   mocha/no-skipped-tests: 0
 
-  node/no-deprecated-api: 0
+  node/no-deprecated-api: 0