Adds fftshift! and ifftshift! to exported functions.

Author: Gregstrq

src/AbstractFFTs.jl

@@ -5,7 +5,7 @@ import ChainRulesCore
 export fft, ifft, bfft, fft!, ifft!, bfft!,
        plan_fft, plan_ifft, plan_bfft, plan_fft!, plan_ifft!, plan_bfft!,
        rfft, irfft, brfft, plan_rfft, plan_irfft, plan_brfft,
-       fftshift, ifftshift, Frequencies, fftfreq, rfftfreq
+       fftshift, ifftshift, fftshift!, ifftshift!, Frequencies, fftfreq, rfftfreq
 
 include("definitions.jl")
 include("chainrules.jl")