ci: test conda/py310 instead of conda/py38
ADD
tests/conda/py310/environment.yml
+dependencies:
+ - python=3.10

ADD
tests/conda/py310/verify
+#!/usr/bin/env python
+import sys
+
+assert sys.version_info[:2] == (3, 10), sys.version

DELETE
tests/conda/py38/environment.yml
-dependencies:
- - python=3.8

DELETE
tests/conda/py38/verify
-#!/usr/bin/env python
-import sys
-
-assert sys.version_info[:2] == (3, 8), sys.version

ci: test conda/py310 instead of conda/py38