Update build version config and theme

Signed-off-by: Nathanael Esayeas <nathanael.esayeas@protonmail.com>

docs/conf.py

@@ -54,9 +54,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '1.0'
+version = '1.6'
 # The full version, including alpha/beta/rc tags.
-release = '1.0-alpha'
+release = '1.6.6'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -101,7 +101,7 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the