Revert "升级typescript"

This reverts commit 2ee05376.

APP/package.json.ftl

@@ -74,7 +74,7 @@ TARGET=PSSYSAPP
     "less-loader": "^5.0.0",
     "mockjs": "^1.1.0",
     "script-loader": "^0.7.2",
-    "typescript": "^4.0.3",
+    "typescript": "~3.5.3",
   <#if app.getAllPSAppPkgs?? && app.getAllPSAppPkgs()??>
   <#list app.getAllPSAppPkgs() as appPackage>
   <#if appPackage.getVerParam2()?? && appPackage.getVerParam2() !="">${appPackage.getVerParam2()},</#if>