Bump DSP to allow v0.8

[gnadt]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.19%. Comparing base (51ea6bc) to head (bcc9346).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #104      +/-   ##
==========================================
+ Coverage   76.20%   77.19%   +0.99%     
==========================================
  Files           6        5       -1     
  Lines         437      456      +19     
==========================================
+ Hits          333      352      +19     
  Misses        104      104              

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[johroj]

I would be very happy if this could be merged and released. The only use of DSP.jl that I can see is DSP.conv, which is not likely to be change over time.

This compat entry means that if I for instance want to have .wav export in a project, I cannot use DSP.jl higher than 0.7, which is extremely annoying.