Fix tests (codesandbox#212)

Author: lbogdan

package.json

@@ -65,7 +65,7 @@
     "promise": "7.1.1",
     "raw-loader": "^0.5.1",
     "react-hot-loader": "^3.0.0-beta.6",
-    "react-test-renderer": "^15.6.1",
+    "react-test-renderer": "16",
     "recursive-readdir": "^2.2.1",
     "rimraf": "^2.6.1",
     "run-sequence": "^1.2.2",

yarn.lock

@@ -6002,6 +6002,8 @@ moment@^2.18.1:
 monaco-editor@CompuIves/codesandbox-monaco-editor:
   version "0.9.0"
   resolved "https://codeload.github.com/CompuIves/codesandbox-monaco-editor/tar.gz/e4e1efb582934ffd8fb135b1cfa1af82cdbc85e3"
+  dependencies:
+    monaco-typescript CompuIves/monaco-typescript
 
 monaco-vue@^0.1.0:
   version "0.1.0"
@@ -7428,12 +7430,12 @@ react-style-proptype@^3.0.0:
   dependencies:
     prop-types "^15.5.4"
 
-react-test-renderer@^15.6.1:
-  version "15.6.2"
-  resolved "https://registry.yarnpkg.com/react-test-renderer/-/react-test-renderer-15.6.2.tgz#d0333434fc2c438092696ca770da5ed48037efa8"
+react-test-renderer@16:
+  version "16.0.0"
+  resolved "https://registry.yarnpkg.com/react-test-renderer/-/react-test-renderer-16.0.0.tgz#9fe7b8308f2f71f29fc356d4102086f131c9cb15"
   dependencies:
-    fbjs "^0.8.9"
-    object-assign "^4.1.0"
+    fbjs "^0.8.16"
+    object-assign "^4.1.1"
 
 react-tippy@^0.14.0:
   version "0.14.0"