Moving jest config out of package.json to facilitate different jest configurations for unit tests and e2e tests

jest.config.js

@@ -0,0 +1,9 @@
+module.exports = {
+  transform: {
+    '^.+\\.jsx?$': './transformer.js'
+  },
+  transformIgnorePatterns: ['/node_modules/(?!dagre-d3-renderer/lib).*\\.js'],
+  moduleNameMapper: {
+    '\\.(css|scss)$': 'identity-obj-proxy'
+  }
+}