Enable CI for julia version 1.2

[c42f]

XRef: https://discourse.julialang.org/t/julia-v1-2-0-rc1-is-now-available/24788

[coveralls]

Coverage remained the same at 81.717% when pulling 8996beb on cjf/julia-1.2-ci into 3b1c73f on master.

[c42f]

Ho hum. This isn't looking very promising.

Travis: Can't unpack the tarball (?)
Appveyor: Illegal instruction - Unreachable reached at 000000002D2EEA01

[codecov-io]

Codecov Report

Merging #610 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #610   +/-   ##
=======================================
  Coverage   81.71%   81.71%           
=======================================
  Files          39       39           
  Lines        2784     2784           
=======================================
  Hits         2275     2275           
  Misses        509      509

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[c42f]

Seems the illegal instruction may not be to do with static arrays:

using LinearAlgebra

a = Hermitian([rand(Complex{Float64}, 1,1) for row = 1:2, col = 1:2])
b = transpose(a)

Unreachable reached at 0x7fc492e51016

signal (4): Illegal instruction
...