[bug] week_of_month is incorrect

[dindom999]

In [1]: import pendulum

In [2]: pendulum.parse("2020-01-01").week_of_month
Out[2]: 1

In [3]: pendulum.parse("2020-01-07").week_of_month
Out[3]: 1  ==>should be 2

In [4]: pendulum.parse("2020-01-14").week_of_month
Out[4]: 2 ==>should be 3

I checked the source code, found the reason, and will pull a request to fix it

[mattsemradlba]

I think bug in week_of_month for last month of year (Dec)

If in December then week_of_month is returning the week_of_year (i.e., 48, 49, 50, 51, 52).

It appears to work for all other months.