Add API_KEY to CI environment

[RyanZim]

Need to have an API key on the CI server in order to run some tests there. Relevant code:

cryptocompare/test/cryptocompare.test.js

Lines 7 to 14 in 6b2cc44

	const API_KEY = process.env.API_KEY
	if (API_KEY) {
	test('setup', t => {
	cc.setApiKey(process.env.API_KEY)
	t.end()
	})
	}

cryptocompare/test/cryptocompare.test.js

Line 278 in 6b2cc44

if (API_KEY) {