Update DatePicker.test.js to use chai.expect - dependency is no longer installed through npm for previous expectation library
Update DatePicker.test.js to use chai.expect - dependency is no longer installed through npm for previous expectation library

tidepool-org/blip,hichameyessou/blip,hichameyessou/blip,tidepool-org/blip,tidepool-org/blip,hichameyessou/blip