Can not install MPI.jl on Julia 1.0

[hshi]

I am trying to add MPI on my Julia with version 1.0.2, got the following error. My machine is MacOS Mojave Version 10.14.5. I have cmake and open MPI installed. May I ask for the reason? It is because of MPI.jl does not support Julia 1.0+? Thank you.

(v1.0) pkg> add MPI
Resolving package versions...
ERROR: Unsatisfiable requirements detected for package JuliaInterpreter [aa1ae85d]:
JuliaInterpreter [aa1ae85d] log:
├─possible versions are: [0.1.1, 0.2.0-0.2.1, 0.3.0-0.3.2, 0.4.0-0.4.1, 0.5.0-0.5.2, 0.6.0] or uninstalled
├─restricted by compatibility requirements with Revise [295af30f] to versions: [0.2.0-0.2.1, 0.3.0-0.3.2, 0.4.0-0.4.1]
│ └─Revise [295af30f] log:
│ ├─possible versions are: [0.0.1-0.0.11, 0.1.0-0.1.1, 0.2.0-0.2.1, 0.3.0, 0.4.0-0.4.3, 0.5.0-0.5.4, 0.6.0-0.6.9, 0.7.0-0.7.15, 1.0.0-1.0.3, 1.1.0, 2.0.0-2.0.7, 2.1.0-2.1.6] or uninstalled
│ └─restricted to versions 2.1.1 by an explicit requirement, leaving only versions 2.1.1
└─restricted by compatibility requirements with LoweredCodeUtils [6f1432cf] to versions: 0.5.0-0.5.2 — no versions left
└─LoweredCodeUtils [6f1432cf] log:
├─possible versions are: [0.1.0-0.1.1, 0.2.0, 0.3.0-0.3.5] or uninstalled
├─restricted by julia compatibility requirements to versions: [0.1.1, 0.2.0, 0.3.0-0.3.5] or uninstalled
└─restricted by compatibility requirements with Revise [295af30f] to versions: 0.3.1
└─Revise [295af30f] log: see above

[hshi]

I can fix the problem by

(v1.0) pkg> update