[Snyk] Upgrade rollup from 1.20.3 to 1.21.0

[snyk-bot]

Snyk has created this PR to upgrade rollup from 1.20.3 to 1.21.0.

• The recommended version is 1 version ahead of your current version.
• The recommended version was released 9 days ago, on 2019-09-08.

Release notes

• 1.21.0 - 2019-09-08

  2019-09-08

  Features

  • Respect output.entryFileNames when preserving modules (#3088)
  • Make accessing unknown globals a side-effect unless this is deactivated via treeshake.unknownGlobalSideEffects (#3068)
  • Respect global objects when checking for pure global functions (#3068)
  • Introduce a type to more easily distinguish chunks and assets in the output bundle (#3080)

  Bug Fixes

  • Recover in watch mode when the initial build fails (#3081)
  • Make sure output.strict is respected for SystemJS output (#3101)

  Pull Requests

  • #3068: Make accessing unknown globals a side-effect (@lukastaegert)
  • #3080: OutputBundle Tagged union with 'type = chunk|asset' (@askbeka)
  • #3081: Watch files onbuild, even if build fails (@mhkeller)
  • #3088: Add support for entryFileNames pattern used in combination with preserveModules option (@Andarist)
  • #3101: Remove 'use strict'; from systemjs when strict=false (@askbeka)
• 1.20.3 - 2019-08-28

  2019-08-28

  Bug Fixes

  • Make sure file hashes change when a change of the naming pattern leads to a file name change of a dependency (#3083)
  • Fix several issues where reexporting an external "default" export could lead to invalid or incorrect code (#3084)

  Pull Requests

  • #3078: Add github actions workflow config for windows (@shellscape)
  • #3083: Properly reflect dependency file names in hash (@lukastaegert)
  • #3084: Fix "default" reexport issues in non ESM/System formats (@lukastaegert)

from rollup GitHub Release Notes

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