Run ews unit-tests with Python 3. (as discussed in https://bugs.webkit.org/show_bug.cgi?id=222554#c5)
Created attachment 422365 [details] Patch
Committed r273980: <https://commits.webkit.org/r273980> All reviewed patches have been landed. Closing bug and clearing flags on attachment 422365 [details].
<rdar://problem/75100350>