Fix startkey in GE API

app/src/main/java/net/vonforst/evmap/api/goingelectric/GoingElectricModel.kt

@@ -25,7 +25,7 @@ import kotlin.math.floor
 data class ChargepointList(
     val status: String,
     val chargelocations: List<ChargepointListItem>,
-    val startkey: Int?
+    @JsonObjectOrFalse val startkey: Int?
 )
 
 @JsonClass(generateAdapter = true)
@@ -278,4 +278,4 @@ data class ChargeCard(
     @Json(name = "card_id") @PrimaryKey val id: Long,
     val name: String,
     val url: String
-)
+)