implement working-directory for lttf deploy #241

Job	Run time
Floating Dependencies	1m 2s
Tests	53s
ember-lts-3.16	1m 4s
ember-lts-3.20	54s
ember-lts-3.24	45s
ember-lts-3.28	55s
ember-lts-4.4	1m 3s
ember-lts-4.8	56s
ember-lts-4.12	1m 13s
ember-lts-5.4	52s
ember-release	1m 3s
ember-beta	1m 2s
ember-canary	44s
ember-classic	1m 5s
embroider-safe	57s
embroider-optimized	1m 11s
no-deprecations	56s
ember-release-no-deprecations	1m 4s
	17m 39s

Provide feedback