Update autoprefixer from 7.1.4 to 7.1.5 in app/vue

[dependencies]

autoprefixer has been updated to 7.1.5 in app/vue by dependencies.io

7.1.5

• Fix ::placeholder prefix for Edge.
• Fix inherit/initial/unset values for flex-direction.
• Fix RegExp usage in gradients (by YetAnotherMinion).

[codecov]

Codecov Report

Merging #2003 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2003   +/-   ##
=======================================
  Coverage   21.34%   21.34%           
=======================================
  Files         262      262           
  Lines        5767     5767           
  Branches      698      697    -1     
=======================================
  Hits         1231     1231           
+ Misses       3991     3984    -7     
- Partials      545      552    +7

Impacted Files	Coverage Δ
lib/ui/src/modules/ui/components/menu_item.js	19.14% <0%> (ø)	⬆️
addons/info/src/components/PropTable.js	21% <0%> (ø)	⬆️
addons/info/src/components/markdown/code.js	24.13% <0%> (ø)	⬆️
addons/knobs/src/components/types/Color.js	8.1% <0%> (ø)	⬆️
lib/ui/src/modules/shortcuts/actions/shortcuts.js	6.25% <0%> (ø)	⬆️
...react-native/src/manager/components/PreviewHelp.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/api/configs/init_api.js	40.47% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/down_panel.js	23.52% <0%> (ø)	⬆️
lib/ui/src/modules/ui/configs/init_panels.js	25% <0%> (ø)	⬆️
lib/ui/src/modules/api/actions/api.js	50.47% <0%> (ø)	⬆️
... and 6 more

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