fix(deps): update dependency graphql-tag to v2.12.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
graphql-tag	2.12.5 -> 2.12.6

---

Release Notes

apollographql/graphql-tag

### [`v2.12.6`](https://togithub.com/apollographql/graphql-tag/blob/master/CHANGELOG.md#v2126) [Compare Source](https://togithub.com/apollographql/graphql-tag/compare/cd2f4d0ab46c515a6628a3bef5600534c7d1a7a0...f2de37aa4396834e00bd08db1fa710ad7b365ada) - Update peer dependencies to allow `graphql` ^16.0.0.
[@​brainkim](https://togithub.com/brainkim) in [#​530](https://togithub.com/apollographql/graphql-tag/pull/530)

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.