Update sewing-kit

This will now warn on unsafe lifecycle hooks like componentWillReceiveProps

tests/build.test.js

@@ -76,7 +76,7 @@ describe('build', () => {
     expect(fs.existsSync('./build/Sass.zip')).toBe(true);
   });
 
-  it('generates the necessary typescript definition files', () => {
+  it('generates the typescript definition files', () => {
     expect(fs.existsSync('./types/index.d.ts')).toBe(true);
   });