Bump cdr.dev/slog from 1.3.0 to 1.4.0 (#264)

* Bump cdr.dev/slog from 1.3.0 to 1.4.0

Bumps [cdr.dev/slog](https://github.com/cdr/slog) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/cdr/slog/releases)
- [Commits](coder/slog@v1.3.0...v1.4.0)

Signed-off-by: dependabot[bot] <support@github.com>

* tidy

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jonathan Yu <jonathan@coder.com>

go.mod

@@ -3,7 +3,7 @@ module cdr.dev/coder-cli
 go 1.14
 
 require (
-	cdr.dev/slog v1.3.0
+	cdr.dev/slog v1.4.0
 	cdr.dev/wsep v0.0.0-20200728013649-82316a09813f
 	github.com/briandowns/spinner v1.11.1
 	github.com/fatih/color v1.10.0

go.sum

@@ -1,5 +1,6 @@
-cdr.dev/slog v1.3.0 h1:MYN1BChIaVEGxdS7I5cpdyMC0+WfJfK8BETAfzfLUGQ=
 cdr.dev/slog v1.3.0/go.mod h1:C5OL99WyuOK8YHZdYY57dAPN1jK2WJlCdq2VP6xeQns=
+cdr.dev/slog v1.4.0 h1:tLXQJ/hZ5Q051h0MBHSd2Ha8xzdXj7CjtzmG/8dUvUk=
+cdr.dev/slog v1.4.0/go.mod h1:C5OL99WyuOK8YHZdYY57dAPN1jK2WJlCdq2VP6xeQns=
 cdr.dev/wsep v0.0.0-20200728013649-82316a09813f h1:WnTUINBwXE11xjp5nTVt+H2qB2/KEymos1jKMcppG9U=
 cdr.dev/wsep v0.0.0-20200728013649-82316a09813f/go.mod h1:2VKClUml3gfmLez0gBxTJIjSKszpQotc2ZqPdApfK/Y=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=