Update lalsuite requirement to 7.2
Now that LALSuite 7.2 is released I should update the requirements of CWInPy, so that it contains the memory leak fixes in lscsoft/lalsuite!1673 (merged).
Now that LALSuite 7.2 is released I should update the requirements of CWInPy, so that it contains the memory leak fixes in lscsoft/lalsuite!1673 (merged).