Replace travis-ci with github actions in README

Author: tomzx

README.md

@@ -17,7 +17,7 @@ The command line utility will use an existing `git` repository to compare to cha
 
 As this is still an alpha package, it is not suggested to include `php-semver-checker-git` directly in your composer.json. There are however a couple ways to use the tool:
 
-1. **Preferred method** Download the [latest .phar build](http://psvcg.coreteks.org/php-semver-checker-git.phar). Note that the .phar build is generally less bleeding edge than the following methods.
+1. **Preferred method** Download the [latest .phar build](https://psvcg.coreteks.org/php-semver-checker-git.phar). Note that the .phar build is generally less bleeding edge than the following methods.
 2. `php composer.phar create-project tomzx/php-semver-checker-git --stability=dev` will clone to a new php-semver-checker-git folder in your current working directory
 3. `git clone https://github.com/tomzx/php-semver-checker-git.git` and `php composer.phar install` in the newly cloned directory.
 
@@ -26,22 +26,43 @@ See the example section for examples of how to use the tool.
 ### Building `php-semver-checker-git.phar`
 First, make sure you have [box](https://github.com/box-project/box2) installed. Then, in the base directory, you can run the following command which will generate the `php-semver-checker-git.phar` file.
 
-```
+```bash
 box build
 ```
 
-### Using `php-semver-checker-git` with `travis-ci`
+### Using `php-semver-checker-git` with `GitHub actions`
 
-It is very easy to add `php-semver-checker-git` to your build process and to get a nice report you can check in the `travis-ci` logs.
+It is very easy to add `php-semver-checker-git` to your build process and to get a nice report you can check in the `GitHub actions` logs.
+In a file under `.github/workflows/`, add the following:
 
-```
-language: php
+```yaml
+name: Continuous integration
+
+on: [push]
 
-# Your configuration
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
 
-after_script:
-    - wget http://psvcg.coreteks.org/php-semver-checker-git.phar
-    - php php-semver-checker-git.phar suggest --allow-detached -vvv --details --include-before=src --include-after=src
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+          coverage: xdebug
+
+    # Your own CI configuration goes here
+
+    - name: Evaluate semantic versioning
+      run: |
+        wget https://psvcg.coreteks.org/php-semver-checker-git.phar
+        php php-semver-checker-git.phar suggest -vvv --include-before=src --include-after=src --details --allow-detached
 ```
 
 In order to simplify the above call to `php-semver-checker-git`, we suggest you create a `php-semver-checker-git.yml` configuration file at the root of your project. In it, you can put the following:
@@ -53,16 +74,26 @@ include-before: src
 include-after: src
 ```
 
-With this configuration file, you can then use the following in your `.travis.yml` file.
+With this configuration file, you can update the configuration file created previously:
+
+Before:
+```yaml
+  # Your own CI configuration goes here
 
+    - name: Evaluate semantic versioning
+      run: |
+        wget https://psvcg.coreteks.org/php-semver-checker-git.phar
+        php php-semver-checker-git.phar suggest -vvv --include-before=src --include-after=src --details --allow-detached
 ```
-language: php
 
-# Your configuration
+After:
+```yaml
+  # Your own CI configuration goes here
 
-after_script:
-    - wget http://psvcg.coreteks.org/php-semver-checker-git.phar
-    - php php-semver-checker-git.phar -vvv
+    - name: Evaluate semantic versioning
+      run: |
+        wget https://psvcg.coreteks.org/php-semver-checker-git.phar
+        php php-semver-checker-git.phar suggest -vvv
 ```
 
 ## Example
@@ -80,16 +111,16 @@ php bin/php-semver-checker-git compare v1.6.4 v2.0.0 --include-before=src --incl
 php bin/php-semver-checker-git suggest --allow-detached --include-before=src --include-after=src
 ```
 
-Note: `--allow-detached` is very useful when you are running this command on [`travis-ci`](https://travis-ci.org) or any other continuous integration provider. It is necessary when a checkout is done on a particular commit, which makes `HEAD` become `detached`. If this option is not passed to the command, it will abort. This is done because it is impossible to revert the original `detached` branch when the `suggest` command completes.
+Note: `--allow-detached` is very useful when you are running this command on [`GitHub actions`](https://github.com/features/actions) or any other continuous integration provider. It is necessary when a checkout is done on a particular commit, which makes `HEAD` become `detached`. If this option is not passed to the command, it will abort. This is done because it is impossible to revert the original `detached` branch when the `suggest` command completes.
 
 ### Compare HEAD against a specific tag constraint
 
 ```bash
 php bin/php-semver-checker-git suggest --allow-detached --include-before=src --include-after=src  --tag=~5.0
 ```
 
-Note: `--tag` supports any semantic versioning constraint such as `<`, `<=`, `>=`, '>', `~x.y.z` and `x.y.*`.
+Note: `--tag` supports any semantic versioning constraint such as `<`, `<=`, `>=`, '>', `~x.y.z`, `^x.y.z` `x.y.*`.
 
 ## License
 
-The code is licensed under the [MIT license](http://choosealicense.com/licenses/mit/). See [LICENSE](LICENSE).
+The code is licensed under the [MIT license](https://choosealicense.com/licenses/mit/). See [LICENSE](LICENSE).