CompatHelper: bump compat for "AbstractFFTs" to "0.5" (#91)

Author: github-actions[bot]

Project.toml

@@ -16,7 +16,7 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 ToeplitzMatrices = "c751599d-da0a-543b-9d20-d0a503d91d24"
 
 [compat]
-AbstractFFTs = "0.4"
+AbstractFFTs = "0.4, 0.5"
 BinaryProvider = "0.5.8"
 DSP = "0.6"
 FFTW = "1"