CompatHelper: bump compat for "MPI" to "0.17" for package test#477

ranocha merged 1 commit intocompathelper/new_version/2021-03-16-00-06-39-411-4132859693trixi-framework/Trixi.jl:compathelper/new_version/2021-03-16-00-06-39-411-4132859693from

compathelper/new_version/2021-03-16-00-06-53-050-2529719006trixi-framework/Trixi.jl:compathelper/new_version/2021-03-16-00-06-53-050-2529719006Copy head branch name to clipboard