gitlab-ci.yml: add 18.06.9 release from demo data

OpenWrt 18.06.9 does not provide JSON data. The demo data
has been compiled from a patched OpenWrt release.
Dispite this, some target did not output json data.

Signed-off-by: Moritz Warning <moritzwarning@web.de>
9 jobs for 18.06.8 in 7 minutes and 17 seconds (queued for 9 minutes and 59 seconds)
latest
Status Job ID Name Coverage
  Pre Build
passed #1096497444
build site for target environment using local directory

00:00:48

passed #1096497441
build site for target environment using remote directory

00:05:14

passed #1096497437
build site on Python 3.6

00:04:59

passed #1096497439
build site on Python 3.8

00:05:00

passed #1096497434
check HTML, CSS and SVG with html5validator

00:00:32

passed #1096497431
check HTML, JS, CSS with eslint and prettier

00:01:04

passed #1096497428
check Python scripts with black and flake8

00:00:30

 
  Test
passed #1096497450
test scaned site with selenium

00:01:27

passed #1096497448
test scraped site with selenium

00:01:30