Add basic testing harness

Author: auxesis

languages/go/goeql/.errcheck-excludes

@@ -0,0 +1,12 @@
+all: test
+
+test: gotest goerrcheck gostaticcheck
+
+gotest:
+	go test ./... -v -timeout=45s -failfast
+
+goerrcheck:
+	errcheck -exclude .errcheck-excludes -ignoretests ./...
+
+gostaticcheck:
+	staticcheck ./...