Drop 1.2 and 1.3 support

maxminddb no longer supports these versions.

Author: oschwald

.travis.yml

@@ -1,8 +1,6 @@
 language: go
 
 go:
- - 1.2
- - 1.3
  - 1.4
  - 1.5
  - 1.6

reader_test.go

@@ -227,8 +227,6 @@ func BenchmarkMaxMindDB(b *testing.B) {
 
 func randomIPv4Address(b *testing.B, r *rand.Rand) net.IP {
 	num := r.Uint32()
-	ip := []byte{byte(num >> 24), byte(num >> 16), byte(num >> 8),
+	return []byte{byte(num >> 24), byte(num >> 16), byte(num >> 8),
 		byte(num)}
-
-	return ip
 }