Hash for infinite ranges and arrays

[jishnub]

Adds hashing for infinite arrays/ranges. Currently, on master, this falls back to the AbstractArray method that doesn't work for infinite arrays. We add special methods here and in related packages.

julia> r = 1:∞
1:∞

julia> hash(r)
ERROR: MethodError: no method matching trailing_zeros(::Infinities.InfiniteCardinal{0})

vs this PR

julia> hash(r)
0xaab73d4eb3b52f6d

[codecov]

Codecov Report

❌ Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.37%. Comparing base (81070e5) to head (d7500b7).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/infhash.jl	95.45%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #242      +/-   ##
==========================================
+ Coverage   90.02%   90.37%   +0.35%     
==========================================
  Files          11       12       +1     
  Lines        1303     1330      +27     
==========================================
+ Hits         1173     1202      +29     
+ Misses        130      128       -2     

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