docs: fix incorrect generated code in example (google#277)

Should be "return foobarbaz.Baz{}, err"

all: remove unused dependencies (google#228)

document wire.Struct first argument (google#197)

go.mod: update to latest version of golang.org/x/tools

This is a cherry-pick commit for 63cf8b9.

internal/wire/testdata/PkgImport: really add the duplicated import (g…

…oogle#105)

docs: fix typo (missing "forgot") in comment (google#92)

Release version 0.1.0