fix: remove the last slash of the target file

Author: hujiulong

package.json

@@ -27,7 +27,7 @@
     "glob": "^7.1.6",
     "p-all": "^2.1.0",
     "p-retry": "^4.2.0",
-    "qiniu": "^7.2.2"
+    "qiniu": "^7.3.0"
   },
   "devDependencies": {
     "@types/jest": "^24.0.24",

src/upload.ts

@@ -5,11 +5,7 @@ import pAll from 'p-all';
 import pRetry from 'p-retry';
 
 function normalizePath(input: string): string {
-  let val = input.replace(/^\//, '');
-  if (!val.endsWith('/')) {
-    val += '/';
-  }
-  return val;
+  return input.replace(/^\//, '');
 }
 
 export function upload(