Fix setup-dhall #79

	jobs:
	build:
	name: Check Frozen Imports
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: dhall-lang/setup-dhall@v4
	with:
	version: "1.42.0"
	- name: dhall freeze
	run: dhall freeze --all ./package.dhall

	name: Test
	on:
	push: {}

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