add object-shorthand as fixable error

examples/eslint/node4/object-shorthand.js

@@ -0,0 +1,11 @@
+'use strict';
+
+function foo() {}
+
+const someVal = 42;
+const okFor = 88;
+
+const thisIs = { okFor: someVal };
+const thisIsNot = { okFor: okFor };
+
+foo(thisIs, thisIsNot);

examples/eslint/node4/object-shorthand.out.js

@@ -0,0 +1,11 @@
+'use strict';
+
+function foo() {}
+
+const someVal = 42;
+const okFor = 88;
+
+const thisIs = { okFor: someVal };
+const thisIsNot = { okFor };
+
+foo(thisIs, thisIsNot);

lib/rules/opinions.js

@@ -56,4 +56,7 @@ module.exports = {
 
   // See: https://eslint.org/docs/rules/no-extra-semi
   'no-extra-semi': 'error',
+
+  // See: https://eslint.org/docs/rules/object-shorthand
+  'object-shorthand': 'error',
 };