Bump symfony/process from 4.3.3 to 4.3.4

Bumps [symfony/process](https://github.com/symfony/process) from 4.3.3 to 4.3.4.
- [Release notes](https://github.com/symfony/process/releases)
- [Changelog](https://github.com/symfony/process/blob/master/CHANGELOG.md)
- [Commits](https://github.com/symfony/process/compare/v4.3.3...v4.3.4)

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

composer.lock

@@ -1116,16 +1116,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v4.3.3",
+            "version": "v4.3.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "856d35814cf287480465bb7a6c413bb7f5f5e69c"
+                "reference": "e89969c00d762349f078db1128506f7f3dcc0d4a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/856d35814cf287480465bb7a6c413bb7f5f5e69c",
-                "reference": "856d35814cf287480465bb7a6c413bb7f5f5e69c",
+                "url": "https://api.github.com/repos/symfony/process/zipball/e89969c00d762349f078db1128506f7f3dcc0d4a",
+                "reference": "e89969c00d762349f078db1128506f7f3dcc0d4a",
                 "shasum": ""
             },
             "require": {
@@ -1161,7 +1161,7 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2019-05-30T16:10:05+00:00"
+            "time": "2019-08-26T08:26:39+00:00"
         },
         {
             "name": "symfony/service-contracts",