add github workflow to test

Author: atoomic

.github/workflows/check.yml

@@ -0,0 +1,13 @@
+name: check
+
+on: [push]
+
+jobs:
+  testing:
+    runs-on: ubuntu-latest
+    name: Testing GitHub action
+    steps:
+    - name: install-cpanm
+      uses: perl-actions/install-cpanm@master
+    - name: which cpanm
+      run: which cpanm

README.md

@@ -1,6 +1,6 @@
 [![Actions Status](https://github.com/perl-actions/install-cpanm/workflows/check/badge.svg)](https://github.com/perl-actions/install-cpanm/actions)
 
-# install-cpm
+# install-cpanm
 
 GitHub action to install App::cpanminus