feat: basic support for displaying version history

this is not terribly feature-rich yet, just the basics

tox.ini

@@ -4,10 +4,13 @@ envlist = py38, py39, py310, py311, nox
 
 [testenv]
 extras = continuum,tests
-commands = pytest {posargs}
+commands =
+        pytest -m 'not versioned' {posargs}
+        pytest -m 'versioned' {posargs}
 
 [testenv:nox]
 extras = tests
+commands = pytest -m 'not versioned' {posargs}
 
 [testenv:pylint]
 basepython = python3.11
@@ -15,7 +18,9 @@ commands = pylint wuttaweb
 
 [testenv:coverage]
 basepython = python3.11
-commands = pytest --cov=wuttaweb --cov-report=html --cov-fail-under=100
+commands =
+        pytest -m 'not versioned' --cov=wuttaweb
+        pytest -m 'versioned' --cov-append --cov=wuttaweb --cov-report=html --cov-fail-under=100
 
 [testenv:docs]
 basepython = python3.11