TST: add test for swt with axis argument
TST: add test for swt with axis argument

rgommers/pywt,eriol/pywt,grlee77/pywt,rgommers/pywt,eriol/pywt,michelp/pywt,PyWavelets/pywt,rgommers/pywt,rgommers/pywt,michelp/pywt,eriol/pywt,michelp/pywt,PyWavelets/pywt,grlee77/pywt