CRITICAL: set doctrine-common to a more specific version to prevent lazy load bug on update

We are using composer in production and used this composer.json als base. After we updated using "composer update" some days ago some things broke in shopware.

Creating / removing  customer-entities and even importing articles was not possible anymore.

Last known valid commit hash was: 9a7e20e779360f3b8a02c27a89d47d5a6fdce8d1
Broken for us at: b1a31ae3df2c18c24bec42e2cc32e3e4bedc07c7

Please be carefull at next build ;)