Add is_anycast output for location DBs

reader.go

@@ -70,6 +70,7 @@ type Enterprise struct {
 		AutonomousSystemNumber       uint    `maxminddb:"autonomous_system_number"`
 		StaticIPScore                float64 `maxminddb:"static_ip_score"`
 		IsAnonymousProxy             bool    `maxminddb:"is_anonymous_proxy"`
+		IsAnycast                    bool    `maxminddb:"is_anycast"`
 		IsLegitimateProxy            bool    `maxminddb:"is_legitimate_proxy"`
 		IsSatelliteProvider          bool    `maxminddb:"is_satellite_provider"`
 	} `maxminddb:"traits"`
@@ -130,6 +131,7 @@ type City struct {
 	} `maxminddb:"location"`
 	Traits struct {
 		IsAnonymousProxy    bool `maxminddb:"is_anonymous_proxy"`
+		IsAnycast           bool `maxminddb:"is_anycast"`
 		IsSatelliteProvider bool `maxminddb:"is_satellite_provider"`
 	} `maxminddb:"traits"`
 }
@@ -163,6 +165,7 @@ type Country struct {
 	} `maxminddb:"represented_country"`
 	Traits struct {
 		IsAnonymousProxy    bool `maxminddb:"is_anonymous_proxy"`
+		IsAnycast           bool `maxminddb:"is_anycast"`
 		IsSatelliteProvider bool `maxminddb:"is_satellite_provider"`
 	} `maxminddb:"traits"`
 }

reader_test.go

@@ -118,6 +118,21 @@ func TestReader(t *testing.T) {
 	assert.False(t, record.RepresentedCountry.IsInEuropeanUnion)
 }
 
+func TestIsAnycast(t *testing.T) {
+	for _, test := range []string{"Country", "City", "Enterprise"} {
+		t.Run(test, func(t *testing.T) {
+			reader, err := Open("test-data/test-data/GeoIP2-" + test + "-Test.mmdb")
+			require.NoError(t, err)
+			defer reader.Close()
+
+			record, err := reader.City(net.ParseIP("214.1.1.0"))
+			require.NoError(t, err)
+
+			assert.True(t, record.Traits.IsAnycast)
+		})
+	}
+}
+
 func TestMetroCode(t *testing.T) {
 	reader, err := Open("test-data/test-data/GeoIP2-City-Test.mmdb")
 	require.NoError(t, err)