Merge pull request #48 from ClimateImpactLab/dependabot/pip/tox-4.6.4

Bump tox from 3.14.0 to 4.6.4

Author: brews

requirements_dev.txt

@@ -5,7 +5,7 @@ cftime==1.6.1
 netCDF4==1.6.4
 wheel==0.40.0
 flake8==3.7.8
-tox==3.14.0
+tox==4.6.4
 coverage==4.5.4
 pytest==7.1.2
 pytest_cov==2.7.1