Update graphql-toolkit monorepo to v0.9.8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@graphql-toolkit/apollo-engine-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/code-file-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/core	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/git-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/github-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/graphql-file-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/json-file-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/prisma-loader	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/schema-merging	dependencies	patch	0.9.7 -> 0.9.8
@graphql-toolkit/url-loader	dependencies	patch	0.9.7 -> 0.9.8

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Release Notes

ardatan/graphql-toolkit

### [`v0.9.8`](https://togithub.com/ardatan/graphql-toolkit/compare/v0.9.7...v0.9.8) [Compare Source](https://togithub.com/ardatan/graphql-toolkit/compare/v0.9.7...v0.9.8)

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