Add apt repo

Author: chdemko

.travis.yml

@@ -3,6 +3,8 @@ before_install:
   - wget https://github.com/jgm/pandoc/releases/download/2.5/pandoc-2.5-1-amd64.deb
   - sudo dpkg -i pandoc-2.5-1-amd64.deb
   - pandoc -v
+  - sudo add-apt-repository ppa:deadsnakes/ppa
+  - sudo apt-get update
   - sudo apt-get install python2.7
   - sudo apt-get install python
   - sudo apt-get install python3.6

README.md

@@ -9,8 +9,8 @@
 [![License](https://img.shields.io/pypi/l/pandoc-codeblock-include.svg?logo=data:image/png;base64,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)](https://raw.githubusercontent.com/chdemko/pandoc-codeblock-include/master/LICENSE)
 [![Python version](https://img.shields.io/pypi/pyversions/pandoc-codeblock-include.svg?logo=Python&logoColor=white)](https://pypi.org/project/pandoc-codeblock-include/)
 [![Development Status](https://img.shields.io/pypi/status/pandoc-codeblock-include.svg?logo=data:image/png;base64,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)](https://pypi.org/project/pandoc-codeblock-include/)
-[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://pypi.org/project/black/)
-license icon by [Daniel Bruce](https://www.iconfinder.com/icons/216659/license_icon), format icon by [Picol](https://www.iconfinder.com/icons/103509/document_text_icon), status icon by [Just Icon](https://www.iconfinder.com/icons/2672768/app_battery_essential_object_status_ui_ux_icon)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg?logo=data:image/png;base64,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)](https://pypi.org/project/black/)
+license icon by [Daniel Bruce](https://www.iconfinder.com/icons/216659/license_icon), format icon by [Picol](https://www.iconfinder.com/icons/103509/document_text_icon), status icon by [Just Icon](https://www.iconfinder.com/icons/2672768/app_battery_essential_object_status_ui_ux_icon), code style icon by [Google Material Design icons](https://www.iconfinder.com/icons/352148/style_icon)
 
 
 *pandoc-codeblock-include* is a [pandoc] filter for including files in `CodeBlock` elements.