Bump sphinxcontrib-htmlhelp from 1.0.3 to 2.0.0

Bumps [sphinxcontrib-htmlhelp](http://sphinx-doc.org/) from 1.0.3 to 2.0.0.

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

Author: dependabot[bot]

docs-requirements.txt

@@ -40,7 +40,7 @@ sphinxcontrib-applehelp==1.0.2
     # via sphinx
 sphinxcontrib-devhelp==1.0.2
     # via sphinx
-sphinxcontrib-htmlhelp==1.0.3
+sphinxcontrib-htmlhelp==2.0.0
     # via sphinx
 sphinxcontrib-jsmath==1.0.1
     # via sphinx

test-requirements.txt

@@ -66,7 +66,7 @@ sphinxcontrib-applehelp==1.0.2
     # via sphinx
 sphinxcontrib-devhelp==1.0.2
     # via sphinx
-sphinxcontrib-htmlhelp==1.0.3
+sphinxcontrib-htmlhelp==2.0.0
     # via sphinx
 sphinxcontrib-jsmath==1.0.1
     # via sphinx