Update dependency graphql-tools to v4.0.5

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This PR contains the following updates:

Package	Type	Update	Change
graphql-tools	devDependencies	patch	4.0.4 -> 4.0.5

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Release Notes

apollographql/graphql-tools

v4.0.5

Compare Source

• Fixes a bug where schemas with scalars could not be merged when passed to
  mergeSchemas as a string or GraphQLSchema.
  
  @​hayes in #​1062
• Make mergeSchemas optionally merge directive definitions.
  
  @​freiksenet in #​1003
• Allow user-provided buildSchema options.
  
  @​trevor-scheer in #​1154

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