Bump html5lib from 0.9999999 to 0.999999999

Bumps [html5lib](https://github.com/html5lib/html5lib-python) from 0.9999999 to 0.999999999.
- [Release notes](https://github.com/html5lib/html5lib-python/releases)
- [Changelog](https://github.com/html5lib/html5lib-python/blob/master/CHANGES.rst)
- [Commits](html5lib/html5lib-python@0.9999999...0.999999999)

---
updated-dependencies:
- dependency-name: html5lib
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -14,7 +14,7 @@ Fabric==1.11.1
 feedgenerator==1.8
 gnureadline==6.3.3
 gravatar==0.1
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.8
 ipython==7.16.3
 ipython-genutils==0.1.0