Bump debhelper from old 11 to 12.

Fixes: lintian: package-uses-old-debhelper-compat-version
See-also: https://lintian.debian.org/tags/package-uses-old-debhelper-compat-version.html

debian/changelog

@@ -3,6 +3,7 @@ node-d3-random (1.1.2-3) UNRELEASED; urgency=medium
   * Trim trailing whitespace.
   * Use secure copyright file specification URI.
   * Strip unusual field spacing from debian/control.
+  * Bump debhelper from old 11 to 12.
 
  -- Debian Janitor <janitor@jelmer.uk>  Thu, 09 Jan 2020 01:18:03 +0000
 

debian/compat

-11
+12

debian/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: Debian Javascript Maintainers <pkg-javascript-devel@lists.alioth.debian.org>
 Uploaders: Pirate Praveen <praveen@debian.org>
 Build-Depends:
- debhelper (>= 11~)
+ debhelper (>= 12~)
  , nodejs
  , rollup
  , uglifyjs.terser