chore(deps): update dependency graphql-tag to v2.10.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
graphql-tag	devDependencies	patch	2.10.1 -> 2.10.4

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Release Notes

apollographql/graphql-tag

### [`v2.10.4`](https://togithub.com/apollographql/graphql-tag/blob/master/CHANGELOG.md#v2104-2020-07-08) [Compare Source](https://togithub.com/apollographql/graphql-tag/compare/v2.10.3...a73bc250d8f3fdd1304c77d1102138171a29b266) - Bump dev/peer deps to accommodate `graphql` 15.
[@​adriencohen](https://togithub.com/adriencohen) in [#​299](https://togithub.com/apollographql/graphql-tag/pull/299) ### [`v2.10.3`](https://togithub.com/apollographql/graphql-tag/blob/master/CHANGELOG.md#v2103-2020-02-05) [Compare Source](https://togithub.com/apollographql/graphql-tag/compare/v2.10.2...v2.10.3) - Further adjustments to the TS `index.d.ts` declaration file.
[@​Guillaumez](https://togithub.com/Guillaumez) in [#​289](https://togithub.com/apollographql/graphql-tag/pull/289) ### [`v2.10.2`](https://togithub.com/apollographql/graphql-tag/blob/master/CHANGELOG.md#v2102-2020-02-04) [Compare Source](https://togithub.com/apollographql/graphql-tag/compare/v2.10.1...v2.10.2) - Update/fix the existing TS `index.d.ts` declaration file.
[@​hwillson](https://togithub.com/hwillson) in [#​285](https://togithub.com/apollographql/graphql-tag/pull/285)

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