Updated SQL Server extensions to fix build failures on PHP 7.4

.travis.yml

@@ -41,9 +41,6 @@ after_script:
     fi
 
 jobs:
-  allow_failures:
-    - php: 7.4snapshot
-
   include:
     - stage: Test
       php: 7.1

tests/travis/install-mssql-pdo_sqlsrv.sh

@@ -4,8 +4,4 @@ set -ex
 
 echo "Installing extension"
 
-if [ "$TRAVIS_PHP_VERSION" == "7.3" ] || [ "$TRAVIS_PHP_VERSION" == "nightly" ] ; then
-  pecl install pdo_sqlsrv-5.4.0preview
-else
-  pecl install pdo_sqlsrv
-fi
+pecl install pdo_sqlsrv-5.7.0preview

tests/travis/install-mssql-sqlsrv.sh

@@ -4,8 +4,4 @@ set -ex
 
 echo "Installing extension"
 
-if [ "$TRAVIS_PHP_VERSION" == "7.3" ] || [ "$TRAVIS_PHP_VERSION" == "nightly" ] ; then
-  pecl install sqlsrv-5.4.0preview
-else
-  pecl install sqlsrv
-fi
+pecl install sqlsrv-5.7.0preview