Drop support for Python 3.9.

Also:
  * Add support for Python 3.14.

Author: funilrys

.github/ISSUE_TEMPLATE/00-bug.yml

@@ -149,11 +149,11 @@ body:
         Please select the Python version you used.
       multiple: true
       options:
-        - "3.9"
         - "3.10"
         - "3.11"
         - "3.12"
         - "3.13"
+        - "3.14"
     validations:
       required: false
 

.github/workflows/branches.yml

@@ -86,11 +86,11 @@ jobs:
       fail-fast: false
       matrix:
         python_version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
         os:
           - ubuntu-latest
           - macos-latest
@@ -125,11 +125,11 @@ jobs:
       fail-fast: false
       matrix:
         python_version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
         os:
           - ubuntu-latest
           - macos-latest

.github/workflows/main.yml

@@ -84,11 +84,11 @@ jobs:
       fail-fast: false
       matrix:
         python_version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
         os:
           - ubuntu-latest
           - macos-latest
@@ -123,11 +123,11 @@ jobs:
       fail-fast: false
       matrix:
         python_version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
         os:
           - ubuntu-latest
           - macos-latest