cmd/gotp: add subcommand "version"

The "version" command print the module version based on the latest tag,
with additional commit number and hash.

1 files changed, 4 insertions, 0 deletions

diff --git a/gotp.go b/gotp.go
index 3b9625a..4e88a4d 100644
--- a/gotp.go
+++ b/gotp.go
@@ -24,6 +24,10 @@ const (
 	providerNameAegis = `aegis`
 )
 
+var (
+	Version = `0.2.0`
+)
+
 // normalizeLabel convert non alpha number, hyphen, underscore, or period
 // characters into `-`.
 func normalizeLabel(in string) (out string) {