findBreakingChanges: extract "diff" utility function (#1908)

Author: IvanGoncharov

src/utilities/__tests__/findBreakingChanges-test.js

@@ -226,14 +226,14 @@ describe('findBreakingChanges', () => {
     `);
 
     expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
-      {
-        type: BreakingChangeType.FIELD_CHANGED_KIND,
-        description: 'InputType1.field1 changed type from String to Int.',
-      },
       {
         type: BreakingChangeType.FIELD_REMOVED,
         description: 'InputType1.field2 was removed.',
       },
+      {
+        type: BreakingChangeType.FIELD_CHANGED_KIND,
+        description: 'InputType1.field1 changed type from String to Int.',
+      },
       {
         type: BreakingChangeType.FIELD_CHANGED_KIND,
         description: 'InputType1.field3 changed type from [String] to String.',