chore: add Pharo 13 build, switch to stable Pharo 12 image

.github/workflows/pharo-12.0.yaml

@@ -19,6 +19,6 @@ jobs:
     name: Build Pharo 12.0
     uses: theseion/fuel/.github/workflows/base.yaml@master
     with:
-      build_targets: '["Pharo64-alpha"]'
+      build_targets: '["Pharo64-12"]'
       configs: '[".default.ston", ".tests.ston"]'
       branch: Pharo12

.github/workflows/pharo-13.0.yaml

@@ -0,0 +1,24 @@
+name: Build Pharo 13.0
+on:
+  push:
+    branches:
+      - Pharo12
+  pull_request_target:
+    branches:
+      - Pharo12
+  schedule:
+    # Minute [0,59]
+    # Hour [0,23]
+    # Day of the month [1,31]
+    # Month of the year [1,12]
+    # Day of the week ([0,6] with 0=Sunday)
+    - cron:  '37 4 * * 6'
+  workflow_dispatch:
+jobs:
+  build:
+    name: Build Pharo 13.0
+    uses: theseion/fuel/.github/workflows/base.yaml@master
+    with:
+      build_targets: '["Pharo64-alpha"]'
+      configs: '[".default.ston", ".tests.ston"]'
+      branch: Pharo13

README.md

@@ -28,7 +28,8 @@ We would love to see your project here too ;)!
 # Status of automated builds
 ### Pharo
 
-[![Build status: Pharo 12 (alpha)](https://img.shields.io/github/actions/workflow/status/theseion/fuel/pharo-12.0.yaml?branch=Pharo12&label=Pharo%2012%20(alpha)&logo=github)](https://github.com/theseion/Fuel/actions/workflows/pharo-12.0.yaml)
+[![Build status: Pharo 13 (alpha)](https://img.shields.io/github/actions/workflow/status/theseion/fuel/pharo-13.0.yaml?branch=Pharo13&label=Pharo%2013%20(alpha)&logo=github)](https://github.com/theseion/Fuel/actions/workflows/pharo-13.0.yaml)
+[![Build status: Pharo 12](https://img.shields.io/github/actions/workflow/status/theseion/fuel/pharo-12.0.yaml?branch=Pharo12&label=Pharo%2012&logo=github)](https://github.com/theseion/Fuel/actions/workflows/pharo-12.0.yaml)
 
 master | 5.2.2 | 5.1.0 | 5.0.6 | 4.1.1 | 3.0.4 | 3.0.3 |
  ------------ | ------------ | ------------ | ------------ | ------------ | ------------ | ------------- |