CI: add stable-2.18, fix README (#681)

* CI: add stable-2.18, fix README

* Update .github/workflows/ansible-test-plugins.yml

Co-authored-by: Laurent Indermühle <laurent.indermuehle@pm.me>

* Update .github/workflows/ansible-test-plugins.yml

Co-authored-by: Laurent Indermühle <laurent.indermuehle@pm.me>

* Update .github/workflows/ansible-test-plugins.yml

Co-authored-by: Laurent Indermühle <laurent.indermuehle@pm.me>

* Update README.md

Co-authored-by: Laurent Indermühle <laurent.indermuehle@pm.me>

---------

Co-authored-by: Laurent Indermühle <laurent.indermuehle@pm.me>

.github/workflows/ansible-test-plugins.yml

@@ -22,9 +22,9 @@ jobs:
     strategy:
       matrix:
         ansible:
-          - stable-2.15
           - stable-2.16
           - stable-2.17
+          - stable-2.18
           - devel
     steps:
       # https://github.com/ansible-community/ansible-test-gh-action
@@ -44,9 +44,9 @@ jobs:
       fail-fast: false
       matrix:
         ansible:
-          - stable-2.15
           - stable-2.16
           - stable-2.17
+          - stable-2.18
           - devel
         db_engine_name:
           - mysql
@@ -282,9 +282,9 @@ jobs:
       fail-fast: true
       matrix:
         ansible:
-          - stable-2.15
           - stable-2.16
           - stable-2.17
+          - stable-2.18
           - devel
         python:
           - '3.8'

README.md

@@ -90,9 +90,9 @@ Here is the table for the support timeline:
 
 ### ansible-core
 
-- stable-2.15
 - stable-2.16
 - stable-2.17
+- stable-2.18
 - current development version
 
 ### Python

tests/sanity/ignore-2.19.txt

@@ -0,0 +1,3 @@
+plugins/modules/mysql_db.py validate-modules:use-run-command-not-popen
+plugins/module_utils/mysql.py pylint:unused-import
+plugins/module_utils/version.py pylint:unused-import