Update dependency flow-bin to v0.70.0

Author: renovate-bot

package.json

@@ -18,7 +18,7 @@
     "deploy": "gh-pages -d build"
   },
   "devDependencies": {
-    "flow-bin": "0.66.0",
+    "flow-bin": "0.70.0",
     "gh-pages": "1.1.0"
   }
 }

yarn.lock

@@ -2600,9 +2600,9 @@ flatten@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/flatten/-/flatten-1.0.2.tgz#dae46a9d78fbe25292258cc1e780a41d95c03782"
 
-flow-bin@0.66.0:
-  version "0.66.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.66.0.tgz#a96dde7015dc3343fd552a7b4963c02be705ca26"
+flow-bin@0.70.0:
+  version "0.70.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.70.0.tgz#080ae83a997f2b4ddb3dc2649bf13336825292b5"
 
 for-in@^1.0.1:
   version "1.0.2"