Enable ext-sqlite3 on Travis CI before installing project

Author: clue

.travis.yml

@@ -24,6 +24,8 @@ matrix:
         - choco install php
         - choco install composer
         - export PATH="$(powershell -Command '("Process", "Machine" | % { [Environment]::GetEnvironmentVariable("PATH", $_) -Split ";" -Replace "\\$", "" } | Select -Unique | % { cygpath $_ }) -Join ":"')"
+        - php -r "file_put_contents(php_ini_loaded_file(),'extension_dir=ext'.PHP_EOL,FILE_APPEND);"
+        - php -r "file_put_contents(php_ini_loaded_file(),'extension=sqlite3'.PHP_EOL,FILE_APPEND);"
   allow_failures:
     - php: hhvm
     - os: windows