Peter Johnson b45572167d [build] Change CI back to 18.04 docker images (#3456) ...

This reverts commit d068fb321f (#3420).

The 18.04 docker images now use GCC 8, which was the original reason for
updating.  20.04 uses a much more recent libc, so staying with 18.04
enables more Linux platforms to use the binaries.

2021-06-20 23:03:29 -07:00

..

ISSUE_TEMPLATE

Add issue templates (#2189)

2020-04-03 08:42:33 -07:00

workflows

[build] Change CI back to 18.04 docker images (#3456)

2021-06-20 23:03:29 -07:00

CODEOWNERS

Add a CODEOWNERS file (#2431)

2020-03-31 20:35:36 -07:00