ARROW-2897: [Packaging] Organize supported Ubuntu versions
See https://github.com/red-data-tools/packages.red-data-tools.org#supported-platforms
Author: Kenji Okimoto <okimoto@clear-code.com>
Closes #2307 from okkez/ubuntu-bionic and squashes the following commits:
8fd66f8c <Kenji Okimoto> Organize supported Ubuntu versions
diff --git a/install.md b/install.md
index 2d47e21..9be800e 100644
--- a/install.md
+++ b/install.md
@@ -79,8 +79,7 @@
* Debian GNU/Linux stretch
* Ubuntu 14.04 LTS
* Ubuntu 16.04 LTS
-* Ubuntu 17.04
-* Ubuntu 17.10
+* Ubuntu 18.04 LTS
* CentOS 6
* CentOS 7
@@ -156,4 +155,4 @@
[9]: https://github.com/red-data-tools/arrow-packages
[10]: {{site.data.versions['current'].release-notes}}
[11]: http://www.apache.org/dist/arrow/KEYS
-[12]: https://www.apache.org/dyn/closer.cgi#verify
\ No newline at end of file
+[12]: https://www.apache.org/dyn/closer.cgi#verify
