Upgrade to emotion v10

Summary: React 16 is not compatible with react-emotion 9 (it prints warnings, see also https://github.com/emotion-js/emotion/issues/644). So we should upgrade to 10.

Reviewed By: mweststrate

Differential Revision: D18905889

fbshipit-source-id: c00d2dbbadb1c08544632cb9bfcd63f2b1818a25

.vscode/launch.json

@@ -7,6 +7,13 @@
       "request": "attach",
       "port": 9222,
       "webRoot": "${workspaceRoot}"
-    }
+    },
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Current Jest Suite",
+      "program": "${workspaceFolder}/node_modules/.bin/jest",
+      "args": ["--runInBand", "${relativeFile}"]
+   }
   ]
 }