DB: enable radar()

p/db/example.js

@@ -26,6 +26,12 @@ client.journeys('8011167', '8000261', {results: 1, tickets: true})
 // 	when: new Date('2018-08-27T10:00:00+0200'),
 // 	maxDuration: 50
 // })
+// client.radar({
+// 	north: 52.52411,
+// 	west: 13.41002,
+// 	south: 52.51942,
+// 	east: 13.41709
+// }, {results: 10})
 
 .then((data) => {
 	console.log(require('util').inspect(data, {depth: null, colors: true}))

p/db/index.js

@@ -388,6 +388,7 @@ const dbProfile = {
 	formatStation,
 
 	trip: true, // todo: #49
+	radar: true,
 	reachableFrom: true
 }
 

test/db.js

@@ -376,6 +376,20 @@ test('line with additionalName', async (t) => {
 	t.end()
 })
 
+test.skip('radar', async (t) => {
+	const vehicles = await client.radar({
+		north: 52.52411,
+		west: 13.41002,
+		south: 52.51942,
+		east: 13.41709
+	}, {
+		duration: 5 * 60, when
+	})
+
+	validate(t, vehicles, 'movements', 'vehicles')
+	t.end()
+})
+
 test('reachableFrom', async (t) => {
 	const torfstr17 = {
 		type: 'location',