Bump numpy from 1.15.4 to 1.16.1

Bumps [numpy](https://www.numpy.org) from 1.15.4 to 1.16.1.

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot-support

requirements.txt

@@ -4,7 +4,7 @@ bblfsh==2.12.7
 modelforge==0.11.0
 sourced-jgit-spark-connector==2.0.1
 parquet==1.2
-numpy==1.15.4
+numpy==1.16.1
 humanize==0.5.1
 pygments==2.3.1
 keras==2.2.4