Update composer

composer.json

@@ -35,7 +35,7 @@
         "popphp/pop-filter": "^3.1.1",
         "popphp/pop-form": "^3.5.1",
         "popphp/pop-ftp": "^3.0.3",
-        "popphp/pop-http": "^4.0.0",
+        "popphp/pop-http": "^4.0.3",
         "popphp/pop-i18n": "^3.1.0",
         "popphp/pop-image": "^3.4.0",
         "popphp/pop-kettle": "^1.3.0",
@@ -45,16 +45,15 @@
         "popphp/pop-mime": "^1.0.0",
         "popphp/pop-nav": "^3.2.1",
         "popphp/pop-paginator": "^3.0.5",
-        "popphp/pop-pdf": "^4.0.0-beta",
+        "popphp/pop-pdf": "^4.0.0",
         "popphp/pop-queue": "^1.1.1",
         "popphp/pop-session": "^3.2.0",
         "popphp/pop-utils": "^1.1.0",
         "popphp/pop-validator": "^3.1.2",
         "popphp/pop-view": "^3.2.0",
-        "popphp/popphp": "^3.4.0",
+        "popphp/popphp": "^3.4.1",
         "popphp/popcorn": "^3.3.1"
     },
-    "minimum-stability": "beta",
     "extra": {
         "branch-alias": {
             "dev-master": "4.5.x-dev"