Add option to override cache key. Add workflow name to default cache … #109

	name: "Run"
	on: [pull_request, push]

	jobs:
	defaults:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macOS-latest]
	steps:
	- uses: mymindstorm/setup-emsdk@master

	- name: Verify
	run: emcc -v
	actions-use-cache-test:
	runs-on: ubuntu-latest
	steps:
	- name: Setup emsdk (use cache if found, create otherwise)
	uses: mymindstorm/setup-emsdk@master
	with:
	version: 2.0.20
	actions-cache-folder: 'emsdk-cache-folder'
	no-cache: true

	- name: Verify
	run: emcc -v
	no-install:
	runs-on: ubuntu-latest
	steps:
	- uses: mymindstorm/setup-emsdk@master
	with:
	no-install: true

	- name: Verify
	run: emsdk list
	tot:
	runs-on: ubuntu-latest
	steps:
	- name: Setup emsdk (use cache if found, create otherwise)
	uses: mymindstorm/setup-emsdk@master
	with:
	version: tot
	no-cache: true
	update-tags: true

	- name: Verify
	run: emcc -v

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