Update letter_opener from 1.6.0 to 1.7.0
Update letter_opener from 1.6.0 to 1.7.0

smcgov/ohana-api-smc,codeforamerica/ohana-api,smcgov/ohana-api-smc,codeforamerica/ohana-api,smcgov/ohana-api-smc,smcgov/ohana-api-smc,codeforamerica/ohana-api,codeforamerica/ohana-api