resolve dependencies from PyPI instead of pinned git forks

Drop the [tool.uv.sources] pins of deltas, mwxml, and yamlconf to forks
under a personal github account:

- The deltas fork was byte-identical to upstream.
- The mwxml fork carried one patch to mwxml.map(), which wikiq does not
  call, and was missing eleven upstream commits of fixes. Require
  mwxml >= 0.3.8 for those fixes; note that 0.3.7 changed namespace
  handling to trust the dump's embedded <ns> tag rather than overriding
  it based on the title prefix.
- The yamlconf fork loosened an old pyyaml pin. yamlconf is not imported
  by wikiq and is only needed transitively via deltas, so drop the direct
  dependency. PyPI's 0.2.6 pinned pyyaml == 5.4.1, which has no wheels
  for 3.11+ and no longer builds from source; that was fixed upstream in
  0.2.7, and the project has since moved to the mediawiki-utilities
  organization.

With pywikidiff2 no longer a dependency at all, no uv-specific
configuration remains and the package installs with plain pip.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pyproject.toml

@@ -11,10 +11,9 @@ dependencies = [
     "mwpersistence>=0.2.4",
     "mwreverts>=0.1.5",
     "mwtypes>=0.4.0",
-    "mwxml>=0.3.6",
+    "mwxml>=0.3.8",
     "pyarrow>=20.0.0",
     "sortedcontainers>=2.4.0",
-    "yamlconf>=0.2.6",
 ]
 
 # Two features carry dependencies that are awkward enough to install that they
@@ -38,12 +37,6 @@ build-backend = "hatchling.build"
 [tool.hatch.build.targets.wheel]
 packages = ["src/wikiq"]
 
-[tool.uv.sources]
-
-yamlconf = { git = "https://github.com/groceryheist/yamlconf" }
-mwxml = { git = "https://github.com/groceryheist/python-mwxml" }
-deltas = { git = "https://github.com/groceryheist/deltas" }
-
 [dependency-groups]
 dev = [
     "ipython>=8.18.1",