chore(deps-dev): bump elliptic from 6.5.4 to 6.6.0 #123

Job	Run time
Lint	40s
Tests (ubuntu-latest, chrome)	31s
Floating Dependencies (ubuntu-latest, chrome)	1m 38s
Tests - ember-lts-3.20	2m 10s
Tests - ember-lts-3.24	2m 9s
Tests - ember-release	46s
Tests - ember-beta	41s
Tests - ember-canary	42s
Tests - ember-default-with-jquery	4m 35s
Tests - ember-classic	2m 21s
Tests - embroider-safe	2m 20s
Tests - embroider-optimized	2m 32s
	21m 5s

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