Set git username ane email

For some reason this isn't set by default on the Ubuntu github runner (but is on Windows/Mac).

Author: Timmmm

src/git.rs

@@ -234,11 +234,30 @@ mod test {
 
         let status = Command::new("git")
             .arg("init")
+            .arg("--initial-branch=master")
             .current_dir(dir.path())
             .status()
             .expect("Failed to run git init");
         assert!(status.success());
 
+        let status = Command::new("git")
+            .arg("config")
+            .arg("user.name")
+            .arg("Test User")
+            .current_dir(dir.path())
+            .status()
+            .expect("Failed to run git config user.name");
+        assert!(status.success());
+
+        let status = Command::new("git")
+            .arg("config")
+            .arg("user.email")
+            .arg("[email protected]")
+            .current_dir(dir.path())
+            .status()
+            .expect("Failed to run git config user.email");
+        assert!(status.success());
+
         let status = Command::new("git")
             .arg("add")
             .arg(&text_path)