Honour metadata added to version

closes https://github.com/therootcompany/go-gitver/issues/2

gitver/gitver.go

@@ -14,7 +14,7 @@ var gitVer *regexp.Regexp
 
 func init() {
 	// exactly vX.Y.Z (go-compatible semver)
-	exactVer = regexp.MustCompile(`^v\d+\.\d+\.\d+$`)
+	exactVer = regexp.MustCompile(`^v\d+\.\d+\.\d+(\+.*)?$`)
 
 	// vX.Y.Z-n-g0000000 git post-release, semver prerelease
 	// vX.Y.Z-dirty git post-release, semver prerelease

gitver/gitver_test.go

@@ -0,0 +1,12 @@
+package gitver
+
+import "fmt"
+
+func Example_semVer_build_meta() {
+	fmt.Println(semVer("v1.5.0+something1"))
+	fmt.Println(semVer("v1.5.0"))
+
+	// Output:
+	// 1.5.0+something1 <nil>
+	// 1.5.0 <nil>
+}