refactor(string): rename trim_space to trim for consistency

update moonbitlang/x dependency to 0.4.38
remove async from ModuleInfo::get_zip_url as it's not needed

Author: oboard

moon.mod.json

@@ -3,7 +3,7 @@
   "version": "0.8.16",
   "deps": {
     "moonbitlang/parser": "0.1.12",
-    "moonbitlang/x": "0.4.37"
+    "moonbitlang/x": "0.4.38"
   },
   "readme": "README.md",
   "repository": "https://github.com/oboard/moonbit-eval",