Update dev dependencies.

Author: igorborgest

requirements-dev.txt

@@ -10,11 +10,11 @@ pytest==6.2.1
 pytest-cov==2.10.1
 pytest-xdist==2.2.0
 pytest-timeout==1.4.2
-cfn-lint~=0.44.0
+cfn-lint~=0.44.1
 pydot~=1.4.1
 cfn-flip==1.2.3
 twine==3.2.0
-sphinx==3.3.1
+sphinx==3.4.0
 sphinx_bootstrap_theme==0.7.1
 moto==1.3.16
 jupyterlab==2.2.9