Update graphql-tools in /modules/api from 2.19.0 to 2.20.0

[dependencies]

Dependencies.io has updated graphql-tools (a npm dependency in /modules/api) from "2.19.0" to "2.20.0".

2.20.0

• Recreate enums and scalars for more consistent behaviour of merged schemas PR #613
• makeExecutableSchema and mergeSchema now accept an array of IResolver PR #612 PR #576 PR #577
• Fix delegateToSchema.ts to remove duplicate new variable definitions when delegating to schemas PR #607
• Fix duplicate subscriptions for schema stitching PR #609

[codecov-io]

Codecov Report

Merging #23 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #23   +/-   ##
=======================================
  Coverage   47.77%   47.77%           
=======================================
  Files          12       12           
  Lines          90       90           
  Branches       15       15           
=======================================
  Hits           43       43           
  Misses         35       35           
  Partials       12       12

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