fix(pa11y-ci): added chrome launch path and necessary ignores (#1043)

* fix(pa11y-ci): added chrome launch path

https://www.npmjs.com/pa11y-ci#pa11y-ci-3-and-ubuntu

* refactor: another try

* refactor: added wcag false/positive ignore

* refactor: wrong place

* refactor: another try

* refactor: another try

Author: mfranzke

.pa11yci

@@ -2,6 +2,9 @@
 	"defaults": {
 		"timeout": 10000,
 		"wait": 2000,
+		"ignore": [
+			"WCAG2AA.Principle1.Guideline1_4.1_4_3.G18.Fail"
+		],
 		"chromeLaunchConfig": {
 			"executablePath": "/usr/bin/google-chrome"
 		}