relax pl and omegaconf requirements

Author: rromb

scripts/reconstruction_usage.ipynb

@@ -408,7 +408,7 @@
    },
    "source": [
     "%%capture\n",
-    "%pip install omegaconf==2.0.0 pytorch-lightning==1.0.8\n",
+    "%pip install omegaconf>=2.0.0 pytorch-lightning>=1.0.8\n",
     "import sys\n",
     "sys.path.append(\".\")\n",
     "\n",