Merge pull request #21 from JuliaParallel/compathelper/new_version/2020-06-24-00-09-58-677-2814663798

CompatHelper: bump compat for "MPI" to "0.15"

Author: simonbyrne

Project.toml

@@ -10,7 +10,7 @@ Serialization = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 Sockets = "6462fe0b-24de-5631-8697-dd941f90decc"
 
 [compat]
-MPI = "0.14"
+MPI = "0.14, 0.15"
 julia = "1"
 
 [extras]