Notable changes:

• mux will only support Go 1.7 and newer: this has allowed us to remove the older gorilla/context code. Go 1.7 has been out since August 2016.
• *Route.Host() matching now includes the host:port, as opposed to just the host.
• Subrouters should correctly return a 405 if the route matches but the method does not (see #437 for details)

CHANGELOG

• [deps] Add go.mod for versioned Go (#376) @elithrar
• Initialize user map (#371) @kalafut
• Update LICENSE & AUTHORS files. (#386) @elithrar
• Add 1.11 to build in travis (#398) @yershalom
• Drop support for Go < 1.7: remove gorilla/context (#391) @fharding1
• Create release-drafter.yml (#399) @elithrar
• Always run on the latest stable Go version. (#402) @elithrar
• Use constant for 301 status code in regexp.go (#412) @trungnn
• Use subtests in mux_test.go (#415) @kanozec
• Add stalebot config (#424) @elithrar
• Update and rename stale to stale.yml (#425) @elithrar
• remove redundant code that remove support gorilla/context (#427) @alimy
• Replace domain.com with example.com (#434) @raeesbhatti
• fix #2, return full host:port info from getHost (#383) @santsai
• Ignore ErrNotFound while matching Subrouters (#438) @g-w
• Call WriteHeader after setting other header(s) in the example (#442) @timucingelici
• replace rr.HeaderMap by rr.Header() (#443) @moeryomenko