Bump actions/cache from 2.1.5 to 2.1.6

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.5...v2.1.6)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/main.yaml

@@ -40,7 +40,7 @@ jobs:
           key: "${{ env.cache-version }}"
 
       - name: "Cache PHP extensions"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.extcache.outputs.dir }}"
           key: "${{ steps.extcache.outputs.key }}"
@@ -61,7 +61,7 @@ jobs:
         run: 'echo "::set-output name=dir::$(composer config cache-files-dir)"'
 
       - name: "Cache PHP dependencies"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.composercache.outputs.dir }}"
           key: "${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}"
@@ -99,7 +99,7 @@ jobs:
           key: "${{ env.cache-version }}"
 
       - name: "Cache PHP extensions"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.extcache.outputs.dir }}"
           key: "${{ steps.extcache.outputs.key }}"
@@ -120,7 +120,7 @@ jobs:
         run: 'echo "::set-output name=dir::$(composer config cache-files-dir)"'
 
       - name: "Cache PHP dependencies"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.composercache.outputs.dir }}"
           key: "${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}"
@@ -165,7 +165,7 @@ jobs:
           key: "${{ env.cache-version }}"
 
       - name: "Cache PHP extensions"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.extcache.outputs.dir }}"
           key: "${{ steps.extcache.outputs.key }}"
@@ -186,7 +186,7 @@ jobs:
         run: 'echo "::set-output name=dir::$(composer config cache-files-dir)"'
 
       - name: "Cache PHP dependencies"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.composercache.outputs.dir }}"
           key: "${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}"
@@ -226,7 +226,7 @@ jobs:
           key: "${{ env.cache-version }}"
 
       - name: "Cache PHP extensions"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.extcache.outputs.dir }}"
           key: "${{ steps.extcache.outputs.key }}"
@@ -247,7 +247,7 @@ jobs:
         run: 'echo "::set-output name=dir::$(composer config cache-files-dir)"'
 
       - name: "Cache PHP dependencies"
-        uses: "actions/cache@v2.1.5"
+        uses: "actions/cache@v2.1.6"
         with:
           path: "${{ steps.composercache.outputs.dir }}"
           key: "${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}"