minor symfony#19150 sync min email validator version (xabbuh)

This PR was merged into the 2.7 branch.

Discussion
----------

sync min email validator version

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

I stumbled upon this while trying to run the min deps version tests while installing everything from the global `composer.json` file. In the Validator component, we already have this present for a long time sine b1b5cca.

Commits
-------

c484db1 sync min email validator version

Author: fabpot

composer.json

@@ -78,7 +78,7 @@
         "monolog/monolog": "~1.11",
         "ircmaxell/password-compat": "~1.0",
         "ocramius/proxy-manager": "~0.4|~1.0|~2.0",
-        "egulias/email-validator": "~1.2"
+        "egulias/email-validator": "~1.2,>=1.2.1"
     },
     "autoload": {
         "psr-4": {