bug #25861 do not conflict with egulias/email-validator 2.0+ (xabbuh)

This PR was merged into the 2.7 branch.

Discussion
----------

do not conflict with egulias/email-validator 2.0+

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | https://github.com/symfony/symfony/pull/25851#issuecomment-359166972
| License       | MIT
| Doc PR        |

Not allowing `egulias/email-validator` 2.0+ will prevent applications using this package from updating to the next patch release.

Commits
-------

1a1aaa74d6 Revert "bug #25851 [Validator] Conflict with egulias/email-validator 2.0 (emodric)"

composer.json

@@ -85,7 +85,6 @@
         "sensio/framework-extra-bundle": "^3.0.2"
     },
     "conflict": {
-        "egulias/email-validator": ">=2.0",
         "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0"
     },
     "autoload": {

src/Symfony/Component/Validator/composer.json

@@ -42,9 +42,6 @@
         "symfony/property-access": "For using the 2.4 Validator API",
         "symfony/expression-language": "For using the 2.4 Expression validator"
     },
-    "conflict": {
-        "egulias/email-validator": ">=2.0"
-    },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Validator\\": "" },
         "exclude-from-classmap": [