Bump symfony/console from 4.2.11 to 4.2.12

Bumps [symfony/console](https://github.com/symfony/console) from 4.2.11 to 4.2.12.
- [Release notes](https://github.com/symfony/console/releases)
- [Changelog](https://github.com/symfony/console/blob/master/CHANGELOG.md)
- [Commits](https://github.com/symfony/console/compare/v4.2.11...v4.2.12)

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

composer.lock

@@ -1885,7 +1885,7 @@
         },
         {
             "name": "symfony/console",
-            "version": "v4.2.11",
+            "version": "v4.2.12",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
@@ -1957,16 +1957,16 @@
         },
         {
             "name": "symfony/contracts",
-            "version": "v1.1.7",
+            "version": "v1.1.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/contracts.git",
-                "reference": "9cb52490dd60e0f50dbcdbdb3a6dbcb31f3a363e"
+                "reference": "f51bca9de06b7a25b19a4155da7bebad099a5def"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/contracts/zipball/9cb52490dd60e0f50dbcdbdb3a6dbcb31f3a363e",
+                "url": "https://api.github.com/repos/symfony/contracts/zipball/f51bca9de06b7a25b19a4155da7bebad099a5def",
-                "reference": "9cb52490dd60e0f50dbcdbdb3a6dbcb31f3a363e",
+                "reference": "f51bca9de06b7a25b19a4155da7bebad099a5def",
                 "shasum": ""
             },
             "require": {
@@ -2030,7 +2030,7 @@
                 "interoperability",
                 "standards"
             ],
-            "time": "2019-10-04T21:43:27+00:00"
+            "time": "2019-11-07T12:44:51+00:00"
         },
         {
             "name": "symfony/debug",
@@ -2933,16 +2933,16 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.12.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "b42a2f66e8f1b15ccf25652c3424265923eb4f17"
+                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/b42a2f66e8f1b15ccf25652c3424265923eb4f17",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/7b4aab9743c30be783b73de055d24a39cf4b954f",
-                "reference": "b42a2f66e8f1b15ccf25652c3424265923eb4f17",
+                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f",
                 "shasum": ""
             },
             "require": {
@@ -2954,7 +2954,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.12-dev"
+                    "dev-master": "1.13-dev"
                 }
             },
             "autoload": {
@@ -2988,7 +2988,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2019-08-06T08:03:45+00:00"
+            "time": "2019-11-27T14:18:11+00:00"
         },
         {
             "name": "symfony/polyfill-php72",