Metadata updates from Google v5.9.4 (r648)

 * Metadata changes:
  - Updated phone metadata for region code(s):
   883, BF, BJ, BW, CL, CR, DZ, FR, GD, IN, JP, MD, NG, NZ, PK, PL, SY,
   UY, VU
  - Updated short number metadata for region code(s): LV, MD
  - New carrier data for country calling code(s): 373 (en), 1473 (en)
  - Updated carrier data for country calling code(s):
   48 (en), 49 (en), 91 (en), 92 (en), 213 (en), 226 (en), 229 (en),
   234 (en), 267 (en), 389 (en), 506 (en), 598 (en)
Add PHP 5.6 support to travis
Merge pull request #18 from giggsey/php56

Add PHP 5.6 support to travis