CompatHelper: bump compat for Interpolations to 0.14, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Interpolations package from 0.13.4 to 0.13.4, 0.14.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

Merging #157 (3cdd422) into master (631d63b) will decrease coverage by 0.18%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #157      +/-   ##
==========================================
- Coverage   90.00%   89.81%   -0.19%     
==========================================
  Files           8        8              
  Lines         220      216       -4     
==========================================
- Hits          198      194       -4     
  Misses         22       22              

Impacted Files	Coverage Δ
src/autorange.jl	93.18% <0.00%> (-0.16%)	⬇️
src/warp.jl	96.29% <0.00%> (-0.14%)	⬇️
src/resizing.jl	100.00% <0.00%> (ø)

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[johnnychen94]

The failure on nightly seems unrelated (JuliaArrays/EndpointRanges.jl#25), so I'm merging it anyway.