fix: upgrade graphql-tag from 2.9.2 to 2.12.5

Snyk has created this PR to upgrade graphql-tag from 2.9.2 to 2.12.5.

See this package in npm:
https://www.npmjs.com/package/graphql-tag

See this project in Snyk:
https://app.snyk.io/org/reactioncommerce/project/536303cd-177f-47dd-aa8b-35217cef374d?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -100,7 +100,7 @@
     "envalid": "^6.0.0",
     "font-awesome": "^4.7.0",
     "graphql": "^14.5.8",
-    "graphql-tag": "2.9.2",
+    "graphql-tag": "2.12.5",
     "graphql.js": "0.4.20",
     "history": "^4.10.1",
     "hoist-non-react-statics": "^2.3.1",