Update dependencies / Fix site version numbers

- os-maven-plugin 1.5.0 -> 1.6.1
- PlantUML 1.2018.3 -> 1.2018.12

pom.xml

@@ -71,7 +71,7 @@
     <dependency>
       <groupId>kr.motd.maven</groupId>
       <artifactId>os-maven-plugin</artifactId>
-      <version>1.5.0.Final</version>
+      <version>1.6.1</version>
       <exclusions>
         <exclusion>
           <groupId>org.apache.maven</groupId>
@@ -90,7 +90,7 @@
     <dependency>
       <groupId>net.sourceforge.plantuml</groupId>
       <artifactId>plantuml</artifactId>
-      <version>1.2018.3</version>
+      <version>1.2018.12</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>

src/site/sphinx/conf.py

@@ -20,8 +20,8 @@
 
 project = u'sphinx-maven-plugin'
 copyright = u'2016, Trustin Lee et al'
-version = '2.2'
-release = '2.2.3'
+version = '2.3'
+release = '2.3.1'
 
 # General options
 needs_sphinx = '1.0'

src/site/sphinx/index.rst

@@ -24,6 +24,7 @@ This plugin provides the following additional extensions out of the box:
 - `sphinxcontrib-plantuml <https://pypi.org/project/sphinxcontrib-plantuml/>`_
 - `sphinxcontrib-inlinesyntaxhighlight <https://sphinxcontrib-inlinesyntaxhighlight.readthedocs.io/>`_
 - `sphinxcontrib-redoc <https://sphinxcontrib-redoc.readthedocs.io/>`_
+- `sphinxcontrib-websupport <https://pypi.org/project/sphinxcontrib-websupport/>`_
 - `sphinxcontrib-youtube <https://pypi.org/project/sphinxcontrib.youtube/>`_
 - `recommonmark <https://recommonmark.readthedocs.io/>`_ + `sphinx_markdown_tables <https://github.com/ryanfox/sphinx-markdown-tables>`_
 - `javasphinx <http://javasphinx.readthedocs.io/>`_