Fix for #1840, Strip operations from results, forwards delete operations to SDKs (#1946)

* Adding a test demonstrating issue #1840.

* Fixes #1840

* Adds failing test with other use case

- That test fails on parse.com as well

* Bumps parse to 1.9.0

* exclude pg db

* Exclude pg on other test

* Adds clientSDK compatibility check for forward deletion

- Mark js1.9.0 as compatible

* Strips all operations from result

- fix for #1606

spec/ClientSDK.spec.js

@@ -0,0 +1,41 @@
+var ClientSDK = require('../src/ClientSDK');
+
+describe('ClientSDK', () => {
+  it('should properly parse the SDK versions', () => {
+      let clientSDKFromVersion = ClientSDK.fromString;
+      expect(clientSDKFromVersion('i1.1.1')).toEqual({
+          sdk: 'i',
+          version: '1.1.1'
+      });
+      expect(clientSDKFromVersion('i1')).toEqual({
+          sdk: 'i',
+          version: '1'
+      });
+      expect(clientSDKFromVersion('apple-tv1.13.0')).toEqual({
+          sdk: 'apple-tv',
+          version: '1.13.0'
+      });
+      expect(clientSDKFromVersion('js1.9.0')).toEqual({
+          sdk: 'js',
+          version: '1.9.0'
+      });
+  });
+  
+  it('should properly sastisfy', () => {
+    expect(ClientSDK.compatible({
+      js: '>=1.9.0'
+    })("js1.9.0")).toBe(true);
+    
+    expect(ClientSDK.compatible({
+      js: '>=1.9.0'
+    })("js2.0.0")).toBe(true);
+
+    expect(ClientSDK.compatible({
+      js: '>=1.9.0'
+    })("js1.8.0")).toBe(false);
+
+    expect(ClientSDK.compatible({
+      js: '>=1.9.0'
+    })(undefined)).toBe(true);
+  })
+})