Bump i18n dependency version
Bump i18n dependency version

This fixes an issue that broke addon-consuming apps that used ember 2.7. (ember internals were reorganized. See ember-i18n/issues/385

jamescdavis/ember-osf,binoculars/ember-osf,cwilli34/ember-osf,CenterForOpenScience/ember-osf,pattisdr/ember-osf,CenterForOpenScience/ember-osf,pattisdr/ember-osf,baylee-d/ember-osf,chrisseto/ember-osf,binoculars/ember-osf,hmoco/ember-osf,jamescdavis/ember-osf,crcresearch/ember-osf,crcresearch/ember-osf,chrisseto/ember-osf,hmoco/ember-osf,cwilli34/ember-osf,baylee-d/ember-osf