Bump numpy from 1.14.5 to 1.15.3
Bump numpy from 1.14.5 to 1.15.3

Bumps [numpy](http://www.numpy.org) from 1.14.5 to 1.15.3.

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
vberlier/nbtlib