Bump aws/aws-sdk-php from 3.93.7 to 3.93.12

Bumps [aws/aws-sdk-php](https://github.com/aws/aws-sdk-php) from 3.93.7 to 3.93.12.
- [Release notes](https://github.com/aws/aws-sdk-php/releases)
- [Changelog](https://github.com/aws/aws-sdk-php/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-php/compare/3.93.7...3.93.12)

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

composer.lock

@@ -358,16 +358,16 @@
         },
         {
             "name": "aws/aws-sdk-php",
-            "version": "3.93.7",
+            "version": "3.93.12",
             "source": {
                 "type": "git",
                 "url": "https://github.com/aws/aws-sdk-php.git",
-                "reference": "41fe205dae433d5cd7a48a4117d37a43a44ed0d2"
+                "reference": "60f5c4bd261e19844d4263c3a8f370e88e038282"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/aws/aws-sdk-php/zipball/41fe205dae433d5cd7a48a4117d37a43a44ed0d2",
+                "url": "https://api.github.com/repos/aws/aws-sdk-php/zipball/60f5c4bd261e19844d4263c3a8f370e88e038282",
-                "reference": "41fe205dae433d5cd7a48a4117d37a43a44ed0d2",
+                "reference": "60f5c4bd261e19844d4263c3a8f370e88e038282",
                 "shasum": ""
             },
             "require": {
@@ -437,7 +437,7 @@
                 "s3",
                 "sdk"
             ],
-            "time": "2019-05-10T18:13:26+00:00"
+            "time": "2019-05-17T18:26:46+00:00"
         },
         {
             "name": "bacon/bacon-qr-code",