feat: Add support for python 3.14 to copier template (#341)

Addresses #315 

Updates python-copier-template to add python 3.14 to the template.

As discussed in the issue, support for the existing 3.11 oldest python
version is retained to increase the number of supported pythons to 4
versions.

Author: rtuck99

template/pyproject.toml.jinja

@@ -10,6 +10,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
 ]
 description = "{{ description }}"
 dependencies = [] # Add project dependencies here, e.g. ["click", "numpy"]

template/{% if git_platform=="github.com" %}.github{% endif %}/workflows/ci.yml.jinja

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         runs-on: ["ubuntu-latest"] # can add windows-latest, macos-latest
-        python-version: ["3.11", "3.12", "3.13"]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
       fail-fast: false
     uses: ./.github/workflows/_test.yml
     with: