chore: bump github.com/briandowns/spinner from 1.13.0 to 1.15.0 (#363)

Bumps [github.com/briandowns/spinner](https://github.com/briandowns/spinner) from 1.13.0 to 1.15.0.
- [Release notes](https://github.com/briandowns/spinner/releases)
- [Commits](briandowns/spinner@v1.13.0...v1.15.0)

---
updated-dependencies:
- dependency-name: github.com/briandowns/spinner
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

go.mod

@@ -5,7 +5,7 @@ go 1.14
 require (
 	cdr.dev/slog v1.4.1
 	cdr.dev/wsep v0.0.0-20200728013649-82316a09813f
-	github.com/briandowns/spinner v1.13.0
+	github.com/briandowns/spinner v1.15.0
 	github.com/fatih/color v1.12.0
 	github.com/google/go-cmp v0.5.6
 	github.com/gorilla/websocket v1.4.2

go.sum

@@ -73,8 +73,8 @@ github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
-github.com/briandowns/spinner v1.13.0 h1:q/Y9LtpwtvL0CRzXrAMj0keVXqNhBYUFg6tBOUiY8ek=
-github.com/briandowns/spinner v1.13.0/go.mod h1:QOuQk7x+EaDASo80FEXwlwiA+j/PPIcX3FScO+3/ZPQ=
+github.com/briandowns/spinner v1.15.0 h1:L0jR0MYN7OAeMwpTzDZWIeqyDLXtTeJFxqoq+sL0VQM=
+github.com/briandowns/spinner v1.15.0/go.mod h1:QOuQk7x+EaDASo80FEXwlwiA+j/PPIcX3FScO+3/ZPQ=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/chzyer/logex v1.1.10 h1:Swpa1K6QvQznwJRcfTfQJmTE72DqScAa40E+fbHEXEE=