Loosen dependency version requirements for Google Colab

Google Colab has numpy=1.23 and pandas=1.5.3

Author: chrisyeh96

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sustaingym"
-version = "0.1.2"
+version = "0.1.2a"
 authors = [
   { name="Christopher Yeh", email="cyeh@caltech.edu" },
 ]
@@ -19,7 +19,7 @@ classifiers = [
 dependencies = [
     "pettingzoo==1.22.*",
     "gymnasium==0.26.*",
-    "numpy>=1.24"
+    "numpy>=1.23"
 ]
 
 [project.optional-dependencies]
@@ -35,7 +35,7 @@ evcharging = [
 cogen = [
     "openpyxl>=3.1",
     "onnxruntime>=1.15, <2",  # semver
-    "pandas>=2, <3",          # semver
+    "pandas>=1.1, <3",          # semver
     "xlrd>=2",
 
     # remove if RLLib ParallelPettingZooEnv wrapper supports