Bump Pkg to 1.5.0.

[fredrikekre]

No description provided.

[JeffBezanson]

Need to figure out if it's ok to merge this despite the freebsd failure. Seems like it would be silly to branch 1.5 without this?

[fredrikekre]

I doubt it is related, failure in cmdlineargs:

Some tests did not pass: 239 passed, 0 failed, 1 errored, 0 broken.
cmdlineargs: Error During Test at /usr/home/julia/buildbot/worker-tabularasa/tester_freebsd64/build/share/julia/test/cmdlineargs.jl:202
  Test threw exception
  Expression: read(`$exename --threads 2 -e $code`, String) == read(`$exename --threads=2 -e $code`, String) == read(`$exename -t2 -e $code`, String) == read(`$exename -t 2 -e $code`, String) == "2"
  failed process: Process(`/usr/home/julia/buildbot/worker-tabularasa/tester_freebsd64/build/bin/julia -Cnative -J/usr/home/julia/buildbot/worker-tabularasa/tester_freebsd64/build/lib/julia/sys.so --depwarn=error --check-bounds=yes -g1 --startup-file=no --startup-file=no --threads=2 -e 'print(Threads.nthreads())'`, ProcessExited(1)) [1]
  
  Stacktrace:
   [1] pipeline_error at ./process.jl:525 [inlined]
   [2] read(::Cmd) at ./process.jl:412
   [3] read(::Cmd, ::Type{String}) at ./process.jl:421

Will restart.