update gsplat version to >=1.3.0 (#3478)

* update gsplat version

* 1.4.0

Author: kerrj

pyproject.toml

@@ -62,7 +62,7 @@ dependencies = [
     "xatlas",
     "trimesh>=3.20.2",
     "timm==0.6.7",
-    "gsplat==1.3.0",
+    "gsplat==1.4.0",
     "pytorch-msssim",
     "pathos",
     "packaging",