add #188

	name: Semgrep
	on: [push]
	jobs:
	semgrep:
	runs-on: ubuntu-latest
	name: Check
	steps:
	- uses: actions/checkout@v1
	- name: Semgrep
	id: semgrep
	uses: returntocorp/semgrep-action@v1
	with:
	config: p/r2c

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