Updated python to version 3.6.3

Author: knorrus

Dockerfile

@@ -9,7 +9,7 @@ RUN yum-builddep -y python; yum -y install make postgresql-devel gcc \
  libtiff-devel libjpeg-devel libzip-devel freetype-devel lcms2-devel libwebp-devel tcl-devel tk-devel \ 
  libxslt-devel libxml2-devel; yum clean all
 
-ENV PYTHON_VERSION="3.5.3"
+ENV PYTHON_VERSION="3.6.3"
 # Downloading and building python
 RUN mkdir /tmp/python-build && cd /tmp/python-build && \
   curl https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tgz > python.tgz && \