Update pytest-bdd to v8.0 (#1955)

* Encapsulate all multiline strings in triple-quotes in Gherkin files

Since pytest-bdd v8.0.0 uses the official Gherkin parser, multiline
strings must now be encapsulated by triple-quotes.

See:
- https://pytest-bdd.readthedocs.io/en/stable/#id2
- https://pytest-bdd.readthedocs.io/en/stable/#docstrings

* Remove comments in Gherkin files causing test breakage

These comments break the step matching.

* Fix compatibility of step-functions matching on multiple lines

In pytest-bdd v8.0.0 it is no longer possible to match based on multiple
lines, which breaks essentially all steps that support docstrings. Solve
this by adding a wrapper-function for each of these instances, that
matches the docstring step, and calls the original function.

So, what used to be:

    @then(parse("the output should match\n{regex}"))
    @then(parse('the output should match "{regex}"'))
    def output_should_match(regex, cli_run):
        ...

Is now:

    @then(parse("the output should match"))
    def output_should_match_docstring(cli_run, docstring):
        output_should_match(docstring, cli_run)

    @then(parse('the output should match "{regex}"'))
    def output_should_match(regex, cli_run):
        ...

There is possibly a way around this that is much better than what I've
done here, but this is a start at least.

* Update version requirement of pytest-bdd to >=8.0

* Update tox config to match poetry config

---------

Co-authored-by: Micah Jerome Ellison <micah.jerome.ellison@gmail.com>

tests/lib/given_steps.py

@@ -13,6 +13,7 @@ from xml.etree import ElementTree as ET
 
 from pytest_bdd import given
 from pytest_bdd.parsers import parse
+from pytest_bdd.parsers import re
 
 from jrnl import __version__
 from jrnl.time import __get_pdt_calendar
@@ -21,7 +22,11 @@ from tests.lib.fixtures import NoKeyring
 from tests.lib.fixtures import TestKeyring
 
 
-@given(parse("we {editor_method} to the editor if opened\n{editor_input}"))
+@given(re(r"we (?P<editor_method>\w+) to the editor if opened"))
+def we_enter_editor_docstring(editor_method, editor_state, docstring):
+    we_enter_editor(editor_method, docstring, editor_state)
+
+
 @given(parse("we {editor_method} nothing to the editor if opened"))
 def we_enter_editor(editor_method, editor_input, editor_state):
     file_method = editor_state["intent"]["method"]