Bump aws/aws-sdk-php from 3.93.0 to 3.93.3

Bumps [aws/aws-sdk-php](https://github.com/aws/aws-sdk-php) from 3.93.0 to 3.93.3.
- [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/3.93.0...3.93.3)

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

composer.lock

@@ -358,16 +358,16 @@
         },
         {
             "name": "aws/aws-sdk-php",
-            "version": "3.93.0",
+            "version": "3.93.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/aws/aws-sdk-php.git",
-                "reference": "021c540f24391e883e15c801d03cbebee1206df1"
+                "reference": "874c1040edab52df3873157aa54ea51833d48c0e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/aws/aws-sdk-php/zipball/021c540f24391e883e15c801d03cbebee1206df1",
-                "reference": "021c540f24391e883e15c801d03cbebee1206df1",
+                "url": "https://api.github.com/repos/aws/aws-sdk-php/zipball/874c1040edab52df3873157aa54ea51833d48c0e",
+                "reference": "874c1040edab52df3873157aa54ea51833d48c0e",
                 "shasum": ""
             },
             "require": {
@@ -437,7 +437,7 @@
                 "s3",
                 "sdk"
             ],
-            "time": "2019-04-30T18:24:07+00:00"
+            "time": "2019-05-03T18:07:06+00:00"
         },
         {
             "name": "bacon/bacon-qr-code",