[Backport 1.2.latest] trying to fix tox issue causing failures (#538)

* trying to fix tox issue causing failures (#534)

* updating tox python version, changing contriburing file example for integration tests

* remove change to contributing file for backport ease

* add changelog

* trying to incorprorate mulit python version

* trying to fix unit test

* remove unneded call to basepython

* back to 3.8

(cherry picked from commit 9511847)

* created allowlist_externals part for unit test

* adding allowlist to spark-session

Co-authored-by: Matthew McKnight <91097623+McKnight-42@users.noreply.github.com>
Co-authored-by: Matthew McKnight <matthew.mcknight@dbtlabs.com>

.changes/unreleased/Under the Hood-20221202-140724.yaml

@@ -0,0 +1,7 @@
+kind: Under the Hood
+body: updating python version in tox
+time: 2022-12-02T14:07:24.377668-06:00
+custom:
+  Author: McKnight-42
+  Issue: "536"
+  PR: "534"

setup.py

@@ -93,6 +93,7 @@ def _get_dbt_core_version():
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
     ],
     python_requires=">=3.7",
 )

tox.ini

@@ -2,8 +2,9 @@
 skipsdist = True
 envlist = unit, flake8, integration-spark-thrift
 
-[testenv:unit]
-basepython = python3.8
+[testenv:{unit,py37,py38,py39,py310,py}]
+allowlist_externals =
+    /bin/bash
 commands = /bin/bash -c '{envpython} -m pytest -v {posargs} tests/unit'
 passenv = DBT_* PYTEST_ADDOPTS
 deps =
@@ -52,6 +53,8 @@ deps =
 
 [testenv:integration-spark-session]
 basepython = python3
+allowlist_externals =
+    /bin/bash
 commands = /bin/bash -c '{envpython} -m pytest -v --profile spark_session {posargs} -n4 tests/functional/adapter/*'
 passenv =
     DBT_*