chore: pin werkzeug to 0.16.1
chore: pin werkzeug to 0.16.1

according to changes in v1.0, werkzeug has moved middleware from
werkzeug.wsgi and werkzeug.contrib to werkzeug.middleware, which
currently breaks frappe. so until that is fixed, we'll pin werkzeug to
0.16.1 to fix this issue.

Signed-off-by: Chinmay D. Pai <ab3234b32bd9ecd2892f3eb0b557ab584a8ff0cf@gmail.com>

vjFaLk/frappe,vjFaLk/frappe,vjFaLk/frappe,vjFaLk/frappe