Closes #48: Adding google maps and open street maps

src/main/java/dev/amatos/restcountries/controller/CountryControllerV3.java

@@ -287,7 +287,8 @@ public class CountryControllerV3 {
       "demonyms",
       "population",
       "flags",
-      "flag"
+      "flag",
+      "maps"
   };
 
   private boolean isEmpty(String value) {

src/main/java/dev/amatos/restcountries/domain/v3/Country.java

@@ -2,9 +2,11 @@ package dev.amatos.restcountries.domain.v3;
 
 import dev.amatos.restcountries.domain.base.BaseCountry;
 import java.util.List;
+import java.util.Map;
 
 public class Country extends BaseCountry {
   private List<String> flags;
+  private Map<String, String> maps;
 
   public List<String> getFlags() {
     return flags;
@@ -13,4 +15,12 @@ public class Country extends BaseCountry {
   public void setFlags(List<String> flags) {
     this.flags = flags;
   }
+
+  public Map<String, String> getMaps() {
+    return maps;
+  }
+
+  public void setMaps(Map<String, String> maps) {
+    this.maps = maps;
+  }
 }