Upgrade php action

Author: simPod

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install PHP
-        uses: shivammathur/setup-php@2.4.2
+        uses: shivammathur/setup-php@2.6.0
         with:
           php-version: 7.4
           coverage: none
@@ -49,7 +49,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install PHP
-        uses: shivammathur/setup-php@2.4.2
+        uses: shivammathur/setup-php@2.6.0
         with:
           php-version: 7.4
           coverage: none
@@ -83,7 +83,7 @@ jobs:
           ref: ${{ github.ref }}
 
       - name: Install PHP
-        uses: shivammathur/setup-php@2.4.2
+        uses: shivammathur/setup-php@2.6.0
         with:
           php-version: 7.4
           coverage: pcov
@@ -125,7 +125,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install PHP
-        uses: shivammathur/setup-php@2.4.2
+        uses: shivammathur/setup-php@2.6.0
         with:
           php-version: ${{ matrix.php }}
           coverage: none