Accept git 1.7.2 as the minimum version

strk · strk · commit 70bc2a3a725e · 2017-11-24T17:08:44.000+01:00
Debian old old (very old) distribution (6.0 aka Squeeze) ships version 1.7.10.4. The version requirement was raised in #46 supposedly for the need of "symbolic-ref" command, but that command is supported by the 1.7.2 version too, and possibly even older versions.
diff --git a/git.go b/git.go
@@ -25,7 +25,7 @@ var (
 	// Prefix the log prefix
 	Prefix = "[git-module] "
 	// GitVersionRequired is the minimum Git version required
-	GitVersionRequired = "1.8.1.6"
+	GitVersionRequired = "1.7.2"
 )
 
 func log(format string, args ...interface{}) {

Original file line number	Diff line number	Diff line change
`@@ -25,7 +25,7 @@ var (`
`25`	`25`	`// Prefix the log prefix`
`26`	`26`	`Prefix = "[git-module] "`
`27`	`27`	`// GitVersionRequired is the minimum Git version required`
`28`		`- GitVersionRequired = "1.8.1.6"`
	`28`	`+ GitVersionRequired = "1.7.2"`
`29`	`29`	`)`
`30`	`30`
`31`	`31`	`func log(format string, args ...interface{}) {`