Travis - add matrix
env:
 matrix:
  - MONGOOSE_NO_SOCKETPAIR
  - MONGOOSE_NO_FILESYSTEM
  - MONGOOSE_NO_AUTH
  - MONGOOSE_NO_DAV
  - MONGOOSE_NO_DIRECTORY_LISTING
  - MONGOOSE_NO_LOGGING
  - MONGOOSE_NO_SSI
  - MONGOOSE_NO_DL
  - MONGOOSE_NO_WEBSOCKET