Add lower bound for msgpack

Author: domdfcoding

formate.toml

@@ -28,42 +28,25 @@ use_parentheses = true
 remove_redundant_aliases = true
 default_section = "THIRDPARTY"
 known_third_party = [
-    "aenum",
-    "alabaster",
     "beautifulsoup4",
-    "bs4",
     "coincidence",
     "coverage",
     "coverage_pyver_pragma",
     "defusedxml",
     "domdf_python_tools",
-    "extras_require",
-    "github",
     "html5lib",
     "importlib_metadata",
+    "msgpack",
     "pygments",
     "pytest",
     "pytest_cov",
     "pytest_randomly",
     "pytest_regressions",
     "pytest_rerunfailures",
     "pytest_timeout",
-    "requests",
     "sphinx",
-    "sphinx_autodoc_typehints",
-    "sphinx_notfound_page",
     "sphinx_prompt",
-    "sphinx_rtd_theme",
-    "sphinx_tabs",
     "sphinx_toolbox",
-    "sphinxcontrib_applehelp",
-    "sphinxcontrib_devhelp",
-    "sphinxcontrib_htmlhelp",
-    "sphinxcontrib_httpdomain",
-    "sphinxcontrib_jsmath",
-    "sphinxcontrib_qthelp",
-    "sphinxcontrib_serializinghtml",
-    "sphinxemoji",
     "typing_extensions",
 ]
 known_first_party = [ "enum_tools",]

tests/requirements.txt

@@ -7,6 +7,7 @@ domdf-python-tools[testing]>=2.0.1
 html5lib>=1.1
 importlib-metadata>=3.6.0
 iniconfig!=1.1.0,>=1.0.1
+msgpack>=1.1.0; python_version >= "3.8"
 pytest>=6.0.0
 pytest-cov>=2.8.1
 pytest-randomly>=3.7.0