[Snyk] Upgrade snyk from 1.247.1 to 1.251.0

Snyk has created this PR to upgrade snyk from 1.247.1 to 1.251.0.

:information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

The recommended version is 5 versions ahead of your current version.
The recommended version was released 9 days ago, on 2019-11-21.

Release notes

Package name: snyk
- 1.251.0 - 2019-11-21
  1.251.0 (2019-11-21)
  
  Features
  - re-enable single jar scanning (758aa68)
- 1.250.0 - 2019-11-20
  1.250.0 (2019-11-20)
  
  Features
  - adding folders for git testing (cfbaaf3)
  - send remoteUrl with payload when doing a snyk test (c52f197)
- 1.249.1 - 2019-11-19
  1.249.1 (2019-11-19)
  
  Bug Fixes
  - prettier issue (94525a4)
  - resolve linting problems (1d6c9ea)
  - Reverts "feat: add unmanaged jar scanning" (13bae9c)
- 1.249.0 - 2019-11-19
  1.249.0 (2019-11-19)
  
  Features
  - add unmanaged jar scanning (9cbeed4)
- 1.248.0 - 2019-11-15
  1.248.0 (2019-11-15)
  
  Features
  - bump cli-interface that brings in skipUnresolved option (386d523)
  - pass allowMissing to ythe python plugin (52b5b48)
- 1.247.1 - 2019-11-13
  1.247.1 (2019-11-13)
  
  Bug Fixes
  - ensure Gradle 6 is supported (73dd54e)