Update project skel. Drop python 3.7 and add 3.12.

Author: ionelmc

.bumpversion.cfg

@@ -22,3 +22,7 @@ replace = version = release = '{new_version}'
 [bumpversion:file:src/lazy_object_proxy/__init__.py]
 search = __version__ = '{current_version}'
 replace = __version__ = '{new_version}'
+
+[bumpversion:file:.cookiecutterrc]
+search = version: {current_version}
+replace = version: {new_version}

.cookiecutterrc

@@ -2,13 +2,10 @@
 
 default_context:
     allow_tests_inside_package: 'no'
-    appveyor: 'no'
     c_extension_function: '-'
     c_extension_module: '-'
     c_extension_optional: 'yes'
     c_extension_support: 'yes'
-    c_extension_test_pypi: 'no'
-    c_extension_test_pypi_username: '-'
     codacy: 'no'
     codacy_projectid: 862e7946eabb4112be6503a667381b71
     codeclimate: 'no'
@@ -18,39 +15,32 @@ default_context:
     coveralls: 'yes'
     distribution_name: lazy-object-proxy
     email: [email protected]
+    formatter_quote_style: single
     full_name: Ionel Cristian Mărieș
     github_actions: 'yes'
     github_actions_osx: 'yes'
     github_actions_windows: 'yes'
-    legacy_python: 'no'
     license: BSD 2-Clause License
-    linter: flake8
     package_name: lazy_object_proxy
     pre_commit: 'yes'
-    pre_commit_formatter: black
     project_name: lazy-object-proxy
     project_short_description: A fast and thorough lazy object proxy.
     pypi_badge: 'yes'
     pypi_disable_upload: 'no'
-    release_date: '2021-12-15'
+    release_date: '2023-01-04'
     repo_hosting: github.com
     repo_hosting_domain: github.com
     repo_main_branch: master
     repo_name: python-lazy-object-proxy
     repo_username: ionelmc
-    requiresio: 'yes'
     scrutinizer: 'no'
-    setup_py_uses_pytest_runner: 'no'
     setup_py_uses_setuptools_scm: 'yes'
     sphinx_docs: 'yes'
     sphinx_docs_hosting: https://python-lazy-object-proxy.readthedocs.io/
     sphinx_doctest: 'no'
     sphinx_theme: sphinx-py3doc-enhanced-theme
-    test_matrix_configurator: 'no'
     test_matrix_separate_coverage: 'yes'
-    travis: 'no'
-    travis_osx: 'no'
-    version: 1.7.1
+    version: 1.9.0
     version_manager: bump2version
     website: https://blog.ionelmc.ro
     year_from: '2014'