Add new rule: no-await-sync-query

Author: Belco90

docs/rules/no-await-sync-query.md

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+# Disallow unnecessary `await` for sync queries (no-await-sync-query)
+
+Please describe the origin of the rule here.
+
+
+## Rule Details
+
+This rule aims to...
+
+Examples of **incorrect** code for this rule:
+
+```js
+
+// fill me in
+
+```
+
+Examples of **correct** code for this rule:
+
+```js
+
+// fill me in
+
+```
+
+### Options
+
+If there are any options, describe them here. Otherwise, delete this section.
+
+## When Not To Use It
+
+Give a short description of when it would be appropriate to turn off this rule.
+
+## Further Reading
+
+If there are other links that describe the issue this rule addresses, please include them here in a bulleted list.

lib/rules/no-await-sync-query.js

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+/**
+ * @fileoverview Disallow unnecessary `await` for sync queries
+ * @author Mario
+ */
+'use strict';
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Disallow unnecessary `await` for sync queries',
+      category: 'Fill me in',
+      recommended: false,
+    },
+    fixable: null, // or "code" or "whitespace"
+    schema: [
+      // fill in your schema
+    ],
+  },
+
+  create: function(context) {
+    // variables should be defined here
+
+    // ----------------------------------------------------------------------
+    // Helpers
+    // ----------------------------------------------------------------------
+
+    // any helper functions should go here or else delete this section
+
+    // ----------------------------------------------------------------------
+    // Public
+    // ----------------------------------------------------------------------
+
+    return {
+      // give me methods
+    };
+  },
+};

tests/lib/rules/no-await-sync-query.js

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+/**
+ * @fileoverview Disallow unnecessary `await` for sync queries
+ * @author Mario
+ */
+'use strict';
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+var rule = require('../../../lib/rules/no-await-sync-query');
+var RuleTester = require('eslint').RuleTester;
+
+// ------------------------------------------------------------------------------
+// Tests
+// ------------------------------------------------------------------------------
+
+var ruleTester = new RuleTester();
+ruleTester.run('no-await-sync-query', rule, {
+  valid: [
+    // give me some code that won't trigger a warning
+  ],
+
+  invalid: [
+    {
+      code: "await getByText('foo')",
+      errors: [
+        {
+          message: 'Fill me in.',
+          type: 'Me too',
+        },
+      ],
+    },
+  ],
+});