Relative time offset does not work

[dangrazh]

I tried to use the following expression:
{% now 'local' - 'days=1', '%d %b %Y %H:%M:%S' %} which leads to the following error: ValueError: Unknown attribute: 'days'

I am working with:

Package         Version
--------------- -------
arrow           1.2.1
Jinja2          3.0.3
jinja2-time     0.2.0

In more detail this is the script:

import jinja2
from jinja2 import Environment, BaseLoader

env = Environment(loader=BaseLoader(), extensions=['jinja2_time.TimeExtension'])

myString = "{% now 'local' - 'days=1', '%d %b %Y %H:%M:%S' %}"
rtemplate = env.from_string(myString)
data = rtemplate.render()
print(data)

and this is the output:

Traceback (most recent call last):
  File "P:\Programming\Python\temp\test_jinja2_time.py", line 9, in <module>
    data = rtemplate.render()
  File "P:\Programming\Python\temp\sandbox\lib\site-packages\jinja2\environment.py", line 1291, in render
    self.environment.handle_exception()
  File "P:\Programming\Python\temp\sandbox\lib\site-packages\jinja2\environment.py", line 925, in handle_exception
    raise rewrite_traceback_stack(source=source)
  File "<template>", line 1, in top-level template code
  File "P:\Programming\Python\temp\sandbox\lib\site-packages\jinja2_time\jinja2_time.py", line 26, in _datetime
    d = d.replace(**replace_params)
  File "P:\Programming\Python\temp\sandbox\lib\site-packages\arrow\arrow.py", line 974, in replace
    raise ValueError(f"Unknown attribute: {key!r}.")
ValueError: Unknown attribute: 'days'.

Looking at the source code, it looks like the d = d.replace(**replace_params) should be switched to d = d.shift(**replace_params) to achieve relative time offset. I did quickly test this against this specific expression and it worked as expected (for this expression).

[kumy]

I also encounter the same issue. The mentioned fix work. Could the PR #19 be merged and a new release done?
Thanks a lot!