Update Composer / Travis configuration for Userforms 5.5 release

.travis.yml

@@ -4,7 +4,7 @@ dist: trusty
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=5.0.x-dev
+    - COMPOSER_ROOT_VERSION=5.5.x-dev
     - TRAVIS_NODE_VERSION="10"
 
 matrix:
@@ -14,9 +14,11 @@ matrix:
     - php: 7.0
       env: DB=MYSQL RECIPE_VERSION=4.3.x-dev PHPUNIT_TEST=1
     - php: 7.1
-      env: DB=MYSQL RECIPE_VERSION=4.3.x-dev PHPUNIT_COVERAGE_TEST=1
+      env: DB=MYSQL RECIPE_VERSION=4.4.x-dev PHPUNIT_COVERAGE_TEST=1
     - php: 7.2
       env: DB=PGSQL RECIPE_VERSION=4.4.x-dev PHPUNIT_TEST=1 NPM_TEST=1
+    - php: 7.3
+      env: DB=MYSQL RECIPE_VERSION=4.5.x-dev PHPUNIT_TEST=1
     - php: 7.3
       env: DB=MYSQL RECIPE_VERSION=4.x-dev PHPUNIT_TEST=1
 

composer.json

@@ -50,9 +50,6 @@
         "silverstripe/gridfieldqueuedexport": "Export large submission as CSV through queued jobs in the background"
     },
     "extra": {
-        "branch-alias": {
-            "dev-master": "5.x-dev"
-        },
         "expose": [
             "client/dist",
             "client/lang",