Fix breakages on OffsetArrays 1.3.1

[timholy]

These were just in deprecated tests, but I think it makes sense to keep these a little longer.

[codecov]

Codecov Report

Merging #149 into master will decrease coverage by 0.52%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #149      +/-   ##
==========================================
- Coverage   77.77%   77.24%   -0.53%     
==========================================
  Files          20       10      -10     
  Lines        1134      567     -567     
==========================================
- Hits          882      438     -444     
+ Misses        252      129     -123     

Impacted Files	Coverage Δ
src/deprecations.jl	57.50% <0.00%> (-7.50%)	⬇️
D:/a/ImageCore.jl/ImageCore.jl/src/precompile.jl
D:/a/ImageCore.jl/ImageCore.jl/src/show.jl
D:/a/ImageCore.jl/ImageCore.jl/src/ImageCore.jl
D:/a/ImageCore.jl/ImageCore.jl/src/traits.jl
D:/a/ImageCore.jl/ImageCore.jl/src/functions.jl
...:/a/ImageCore.jl/ImageCore.jl/src/colorchannels.jl
D:/a/ImageCore.jl/ImageCore.jl/src/deprecations.jl
...ageCore.jl/ImageCore.jl/src/convert_reinterpret.jl
D:/a/ImageCore.jl/ImageCore.jl/src/stackedviews.jl
... and 1 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8993b6c...f683c61. Read the comment docs.