switched to ^5.5 dependency

Author: jarektkaczyk

composer.json

@@ -24,11 +24,11 @@
     ],
     "require": {
         "php": ">=7.0.0",
-        "sofa/eloquence-base": "5.5.*",
-        "sofa/eloquence-metable": "5.5.*",
-        "sofa/eloquence-mutable": "5.5.*",
-        "sofa/eloquence-mappable": "5.5.*",
-        "sofa/eloquence-validable": "5.5.*"
+        "sofa/eloquence-base": "^5.5",
+        "sofa/eloquence-metable": "^5.6",
+        "sofa/eloquence-mutable": "^5.5",
+        "sofa/eloquence-mappable": "^5.5",
+        "sofa/eloquence-validable": "^5.5"
     },
     "require-dev": {
         "phpunit/phpunit": "4.5.0",