Fix: tox.ini configurations packages & opts

Author: meherett

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = python39
+envlist = python39,python310,python311
 
 [travis]
 python =
@@ -9,21 +9,21 @@ python =
 
 [testenv:python39]
 install_command =
-  python -m pip install --upgrade pip
-  pip install -e .
+  python -m pip install --upgrade pip {opts} {packages}
+  pip install -e . {opts} {packages}
 extras = tests,docs
 commands = python -m pytest
 
 [testenv:python310]
 install_command =
-  python -m pip install --upgrade pip {packages}
-  pip install -e . {packages}
+  python -m pip install --upgrade pip {opts} {packages}
+  pip install -e . {opts} {packages}
 extras = tests,docs
 commands = python -m pytest
 
 [testenv:python311]
 install_command =
-  python -m pip install --upgrade pip {packages}
-  pip install -e . {packages}
+  python -m pip install --upgrade pip {opts} {packages}
+  pip install -e . {opts} {packages}
 extras = tests,docs
 commands = python -m pytest