Switch to semver, basic test.

config/config_test.go

@@ -0,0 +1,13 @@
+package config_test
+
+import (
+	"testing"
+
+	"github.com/tardisx/discord-auto-upload/config"
+)
+
+func TestVersioning(t *testing.T) {
+	if !config.NewVersionAvailable("v0.1.0") {
+		t.Error("should be a version newer than v0.1.0")
+	}
+}