Don't fail if there are no Github extensions (fix #877)

src/steps/generic.rs

@@ -478,6 +478,11 @@ pub fn spicetify_upgrade(ctx: &ExecutionContext) -> Result<()> {
 
 pub fn run_ghcli_extensions_upgrade(ctx: &ExecutionContext) -> Result<()> {
     let gh = utils::require("gh")?;
+    let result = Command::new(&gh).args(&["extensions", "list"]).check_output();
+    if result.is_err() {
+        debug!("GH result {:?}", result);
+        return Err(SkipStep(String::from("GH failed")).into());
+    }
 
     print_separator("GitHub CLI Extensions");
     ctx.run_type()

src/steps/os/windows.rs

@@ -70,7 +70,7 @@ fn get_wsl_distributions(wsl: &Path) -> Result<Vec<String>> {
     Ok(output
         .lines()
         .filter(|s| !s.is_empty())
-        .map(|x| x.replace("\u{0}", "").replace('\r', ""))
+        .map(|x| x.replace('\u{0}', "").replace('\r', ""))
         .collect())
 }