chore(package): update apollo-cache-inmemory to version 1.6.6

Closes #6675

Author: greenkeeper[bot]

package.json

@@ -64,7 +64,7 @@
     "@babel/plugin-transform-flow-strip-types": "7.9.0",
     "@babel/preset-env": "7.9.6",
     "@parse/minami": "1.0.0",
-    "apollo-cache-inmemory": "1.6.5",
+    "apollo-cache-inmemory": "1.6.6",
     "apollo-client": "2.6.6",
     "apollo-link": "1.2.14",
     "apollo-link-http": "1.5.17",