Fixes typo in an npm starter

6 jobs for master in 13 minutes and 3 seconds (queued for 1 second)
Status Job ID Name Coverage
  Install
passed #152547
nodejs
install_node_modules

00:01:26

 
  Test
failed #152549
nodejs allowed to fail
npm_test

00:02:23

passed #152548
nodejs
ts_lint

00:01:47

 
  Build
passed #152550
nodejs
build

00:03:25

 
  Assets
passed #152551
nodejs
generate_assets

00:05:34

 
  Deploy
passed #152552
rsync
deploy

00:00:15

 
Name Stage Failure
failed
npm_test Test
src/app/markdown/markdown-bar/markdown-bar.component.spec.ts(68,22): error TS2339: Property 'allDisplayedMarkdownBarElements' does not exist on type 'MarkdownBarComponent'.
src/app/markdown/markdown-bar/markdown-bar.component.spec.ts(69,96): error TS2339: Property 'hiddenMarkdownBarElements' does not exist on type 'MarkdownBarComponent'.
src/app/pipes/generic-filter/generic-filter.pipe.spec.ts(5,18): error TS2554: Expected 1 arguments, but got 0.
src/app/root/root/root.component.ts(76,60): error TS2304: Cannot find name 'BeforeInstallPromptEvent'.

npm info lifecycle arsnova-click-v2-frontend@1.0.0~test: Failed to exec test script
npm ERR! Test failed. See above for more details.
npm timing npm Completed in 13868ms
ERROR: Job failed: exit code 1