Bumps a sleep value in workbox-precaching's integration test

[jeffposnick]

R: @philipwalton

Fixes #1804

This, as all magic sleep values, is gross... but we already were sleeping for 100ms, and it looks like that isn't enough in the current Chrome Beta. Bumping it up to 1000ms made the tests pass locally...

[workbox-pr-bot]

PR-Bot Size Plugin

Changed File Sizes

File	Before	After	Change	GZipped
packages/workbox-background-sync/build/workbox-background-sync.prod.js	3.51 KB	3.60 KB	+3%	1.56 KB
packages/workbox-broadcast-cache-update/build/workbox-broadcast-cache-update.prod.js	1.12 KB	1.88 KB	+68%	939 B	☠️
packages/workbox-build/build/index.js	4.02 KB	3.64 KB	-9%	1.36 KB
packages/workbox-cache-expiration/build/workbox-cache-expiration.prod.js	3.88 KB	3.15 KB	-19%	1.29 KB	🎉
packages/workbox-cacheable-response/build/workbox-cacheable-response.prod.js	587 B	594 B	+1%	350 B
packages/workbox-cli/build/app.js	6.76 KB	5.58 KB	-17%	1.98 KB	🎉
packages/workbox-cli/build/bin.js	2.32 KB	1.16 KB	-50%	580 B	🎉
packages/workbox-core/build/workbox-core.prod.js	7.47 KB	6.20 KB	-17%	2.79 KB	🎉
packages/workbox-navigation-preload/build/workbox-navigation-preload.prod.js	660 B	667 B	+1%	323 B
packages/workbox-precaching/build/workbox-precaching.prod.js	5.80 KB	5.27 KB	-9%	2.21 KB
packages/workbox-range-requests/build/workbox-range-requests.prod.js	1.63 KB	1.53 KB	-6%	764 B
packages/workbox-routing/build/workbox-routing.prod.js	2.87 KB	3.28 KB	+14%	1.43 KB	☠️
packages/workbox-strategies/build/workbox-strategies.prod.js	5.09 KB	4.75 KB	-7%	1.19 KB
packages/workbox-streams/build/workbox-streams.prod.js	1.57 KB	1.39 KB	-12%	683 B	🎉
packages/workbox-sw/build/workbox-sw.js	1.50 KB	1.51 KB	+1%	818 B
packages/workbox-webpack-plugin/build/generate-sw.js	8.04 KB	5.29 KB	-34%	1.84 KB	🎉
packages/workbox-webpack-plugin/build/index.js	742 B	349 B	-53%	255 B	🎉
packages/workbox-webpack-plugin/build/inject-manifest.js	10.30 KB	6.91 KB	-33%	2.40 KB	🎉

New Files

File	Size	GZipped
packages/workbox-google-analytics/build/workbox-offline-ga.prod.js	1.74 KB	877 B

All File Sizes

View Table

File	Before	After	Change	GZipped
packages/workbox-background-sync/build/workbox-background-sync.prod.js	3.51 KB	3.60 KB	+3%	1.56 KB
packages/workbox-broadcast-cache-update/build/workbox-broadcast-cache-update.prod.js	1.12 KB	1.88 KB	+68%	939 B	☠️
packages/workbox-build/build/_types.js	41 B	41 B	0%	61 B
packages/workbox-build/build/index.js	4.02 KB	3.64 KB	-9%	1.36 KB
packages/workbox-cache-expiration/build/workbox-cache-expiration.prod.js	3.88 KB	3.15 KB	-19%	1.29 KB	🎉
packages/workbox-cacheable-response/build/workbox-cacheable-response.prod.js	587 B	594 B	+1%	350 B
packages/workbox-cli/build/app.js	6.76 KB	5.58 KB	-17%	1.98 KB	🎉
packages/workbox-cli/build/bin.js	2.32 KB	1.16 KB	-50%	580 B	🎉
packages/workbox-core/build/workbox-core.prod.js	7.47 KB	6.20 KB	-17%	2.79 KB	🎉
packages/workbox-google-analytics/build/workbox-offline-ga.prod.js		1.74 KB		877 B
packages/workbox-navigation-preload/build/workbox-navigation-preload.prod.js	660 B	667 B	+1%	323 B
packages/workbox-precaching/build/workbox-precaching.prod.js	5.80 KB	5.27 KB	-9%	2.21 KB
packages/workbox-range-requests/build/workbox-range-requests.prod.js	1.63 KB	1.53 KB	-6%	764 B
packages/workbox-routing/build/workbox-routing.prod.js	2.87 KB	3.28 KB	+14%	1.43 KB	☠️
packages/workbox-strategies/build/workbox-strategies.prod.js	5.09 KB	4.75 KB	-7%	1.19 KB
packages/workbox-streams/build/workbox-streams.prod.js	1.57 KB	1.39 KB	-12%	683 B	🎉
packages/workbox-sw/build/workbox-sw.js	1.50 KB	1.51 KB	+1%	818 B
packages/workbox-webpack-plugin/build/generate-sw.js	8.04 KB	5.29 KB	-34%	1.84 KB	🎉
packages/workbox-webpack-plugin/build/index.js	742 B	349 B	-53%	255 B	🎉
packages/workbox-webpack-plugin/build/inject-manifest.js	10.30 KB	6.91 KB	-33%	2.40 KB	🎉

Workbox Aggregate Size Plugin

9.85KB gzip'ed (66% of limit)
24.17KB uncompressed