Undeclared Jinja2 dependency

[craigds]

Description

pycsw depends on jinja2 for some reason, and this isn't declared in requirements.txt

Environment

• operating system: mac/linux
• Python version: 3.10
• pycsw version: master (c532be3)

Steps to Reproduce

>>> from pycsw import server
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/cdestigter/code/pycsw/pycsw/server.py", line 48, in <module>
    from pycsw.ogc.api.util import yaml_load
  File "/Users/cdestigter/code/pycsw/pycsw/ogc/api/util.py", line 45, in <module>
    from jinja2 import Environment, FileSystemLoader
ModuleNotFoundError: No module named 'jinja2'

[kalxas]

Jinja is pulled in by https://github.com/geopython/pycsw/blob/master/requirements-standalone.txt

[craigds]

hm, confusing; I hadn't considered looking in a nonstandard location for this (and, grepping didn't find it)

I suppose that's fine except that things pycsw actually imports directly should probably be mentioned explicitly there, rather than pulled in as a side-effect of some other dependency

[craigds]

changed my PR to pull it in explicitly in requirements-standalone.txt. thanks