Travis CI: Get rid of explicit '--yes' option on 'apt-get install' call since it's implied by default.
Travis CI: Get rid of explicit '--yes' option on 'apt-get install' call since it's implied by default.

rgolubtsov/dnsresolvd-multilang,rgolubtsov/dnsresolvd-multilang,rgolubtsov/dnsresolvd-multilang,rgolubtsov/dnsresolvd-multilang,rgolubtsov/dnsresolvd-multilang,rgolubtsov/dnsresolvd-multilang,rgolubtsov/dnsresolvd-multilang