sowm: Test patches in CI.

.github/workflows/main.yml

@@ -0,0 +1,9 @@
+name: CI
+on: [push]
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v1
+            - name: Apply patches.
+              run:  make test

Makefile

@@ -19,3 +19,6 @@ install: all
 
 clean:
 	rm -f sowm *.o
+
+test:
+	for patch in patches/*.patch; do patch -p1 < "$patch"; done