Update url for fastboot-app-server in package.json for npm #782

Job	Run time
Legacy Mocha Tests - 16.x	25s
Ember Tests (16.x, ubuntu-latest)	52s
Legacy Mocha Tests - 14.x	31s
discover_matrix	30s
Ember Tests (16.x, windows-latest)	2m 46s
lint-all-packages	32s
Ember Tests (14.x, ubuntu-latest)	1m 7s
Test Packages (16.x, ubuntu-latest)	1m 15s
Ember Tests (14.x, windows-latest)	2m 27s
ember-try for ember-cli-fastboot: ember-lts-3.16	51s
Test Packages (16.x, windows-latest)	3m 28s
ember-try for ember-cli-fastboot: ember-lts-3.20	52s
Test Packages (14.x, ubuntu-latest)	1m 18s
ember-try for ember-cli-fastboot: ember-lts-3.24	1m 7s
Test Packages (14.x, windows-latest)	3m 9s
ember-try for ember-cli-fastboot: ember-lts-3.28	1m 3s
ember-try for ember-cli-fastboot: ember-lts-4.4	46s
ember-try for ember-cli-fastboot: ember-lts-4.8	1m 0s
ember-try for ember-cli-fastboot: ember-lts-4.12	48s
ember-try for ember-cli-fastboot: ember-lts-5.4	1m 7s
ember-try for ember-cli-fastboot: ember-release	54s
ember-try for ember-cli-fastboot: ember-beta	54s
ember-try for ember-cli-fastboot: ember-canary	56s
ember-try for ember-cli-fastboot: embroider-safe	49s
ember-try for ember-cli-fastboot: embroider-optimized	50s
ember-try for ember-cli-fastboot: no-deprecations	47s
ember-try for ember-cli-fastboot: ember-release-no-deprecations	51s
custom-output-paths	38s
ember-cli-fastboot	43s
fastboot-config-location	36s
fastboot-express-middleware	34s
fastboot-location	47s
fastboot-shoebox-test	34s
integration-tests	1m 22s
oneerror-per-visit	1m 4s
request-details	37s
root-url	34s
	39m 24s

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