Bump actions/cache from v2.1.4 to v2.1.5 (#4564)

Bumps [actions/cache](https://github.com/actions/cache) from v2.1.4 to v2.1.5.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.4...1a9e213)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/test-phpstan.yml

@@ -54,7 +54,7 @@ jobs:
         run: mkdir -p ${{ steps.composer-cache.outputs.dir }}
 
       - name: Cache composer dependencies
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
@@ -64,7 +64,7 @@ jobs:
         run: mkdir -p build/phpstan
 
       - name: Cache PHPStan result cache directory
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         with:
           path: build/phpstan
           key: ${{ runner.os }}-phpstan-${{ github.sha }}

.github/workflows/test-phpunit.yml

@@ -108,7 +108,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: Cache dependencies
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         with:
           path: ${{ steps.composercache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}

.github/workflows/test-rector.yml

@@ -58,7 +58,7 @@ jobs:
         run: mkdir -p ${{ steps.composer-cache.outputs.dir }}
 
       - name: Cache composer dependencies
-        uses: actions/cache@v2.1.4
+        uses: actions/cache@v2.1.5
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}