Switch default python to 3.10

3.7 is *quite* old, and folks get caught up in it because
it also sometimes forces much older versions of packages - and
it can be quite confusing to debug (see
2i2c-org/infrastructure#1934)
for example.

Author: yuvipanda

repo2docker/buildpacks/conda/environment.lock

@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2022-10-13 14:39:39 UTC
+# Generated on 2022-11-18 22:33:38 UTC
 channels:
 - conda-forge
 dependencies:

repo2docker/buildpacks/conda/environment.py-3.10.lock

@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2022-10-13 14:38:39 UTC
+# Generated on 2022-11-18 22:32:43 UTC
 channels:
 - conda-forge
 dependencies:

repo2docker/buildpacks/conda/environment.py-3.10.yml

@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2022-10-13 14:39:03 UTC
+# Generated on 2022-11-18 22:33:01 UTC
 channels:
 - conda-forge
 dependencies:

repo2docker/buildpacks/conda/environment.py-3.7.lock

@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2022-10-13 14:39:21 UTC
+# Generated on 2022-11-18 22:33:18 UTC
 channels:
 - conda-forge
 dependencies:

repo2docker/buildpacks/conda/environment.py-3.7.yml

@@ -120,7 +120,7 @@ def set_python(py_env_file, py):
         default=("3.7", "3.8", "3.9", "3.10"),
     )
     args = parser.parse_args()
-    default_py = "3.7"
+    default_py = "3.10"
     for py in args.py:
         env_file = pathlib.Path(str(ENV_FILE_T).format(py=py))
         set_python(env_file, py)