mediawiki-core-npm-node-6-docker Jenkins job is failing with
`Warning: Task "stylelint:src" failed.`
Bug: T190269
Change-Id: Ic69be92c2b0b7a08a9b8cc417a40ebb38f249ea3
"karma-mocha-reporter": "2.2.5",
"karma-qunit": "1.2.1",
"nodemw": "0.11.0",
"karma-mocha-reporter": "2.2.5",
"karma-qunit": "1.2.1",
"nodemw": "0.11.0",
+ "postcss-less": "1.1.3",
"qunitjs": "2.4.1",
"stylelint": "8.2.0",
"stylelint-config-wikimedia": "0.4.2",
"qunitjs": "2.4.1",
"stylelint": "8.2.0",
"stylelint-config-wikimedia": "0.4.2",