Update render and vm with contributor prs

Author: DD Liu

package-lock.json

@@ -111,10 +111,10 @@
     "scratch-blocks": "0.1.0-prerelease.1585138708",
     "scratch-l10n": "3.8.20200325112845",
     "scratch-paint": "0.2.0-prerelease.20200213174123",
-    "scratch-render": "0.1.0-prerelease.20200228152431",
+    "scratch-render": "0.1.0-prerelease.20200402191852",
     "scratch-storage": "1.3.2",
     "scratch-svg-renderer": "0.2.0-prerelease.20200205003400",
-    "scratch-vm": "0.2.0-prerelease.20200319175700",
+    "scratch-vm": "0.2.0-prerelease.20200402182733",
     "selenium-webdriver": "3.6.0",
     "startaudiocontext": "1.2.1",
     "style-loader": "^0.23.0",