Update .travis.yml

.travis.yml

@@ -1,6 +1,6 @@
+dist: xenial
+
 language: php
-sudo: false
-dist: trusty
 
 cache:
     directories:
@@ -271,44 +271,44 @@ jobs:
       install:
         - travis_retry composer update --prefer-dist --prefer-lowest
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=mysql.docker MYSQL_VERSION=8.0
       sudo: required
       services:
         - docker
       before_script:
         - bash ./tests/travis/install-mysql-8.0.sh
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=mysqli.docker MYSQL_VERSION=8.0
       sudo: required
       services:
         - docker
       before_script:
         - bash ./tests/travis/install-mysql-8.0.sh
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=mariadb MARIADB_VERSION=10.3
       addons:
         mariadb: 10.3
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=mariadb.mysqli MARIADB_VERSION=10.3
       addons:
         mariadb: 10.3
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=pgsql POSTGRESQL_VERSION=11.0
       sudo: required
       services:
         - docker
       before_script:
         - bash ./tests/travis/install-postgres-11.sh
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=sqlite
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=sqlsrv
       sudo: required
       services:
@@ -318,7 +318,7 @@ jobs:
         - bash ./tests/travis/install-mssql-sqlsrv.sh
         - bash ./tests/travis/install-mssql.sh
     - stage: Test
-      php: 7.4snapshot
+      php: 7.4
       env: DB=pdo_sqlsrv
       sudo: required
       services: