Merge pull request #22 from rossjones/patch-3

Adds Wirral

lib/uk_planning_scraper/authorities.csv

@@ -64,3 +64,4 @@ Wakefield,https://planning.wakefield.gov.uk/online-applications/search.do?action
 South Downs,https://planningpublicaccess.southdowns.gov.uk/online-applications/search.do?action=advanced,nationalparks,england
 Edinburgh,https://citydev-portal.edinburgh.gov.uk/idoxpa-web/search.do?action=advanced,scotland
 Glasgow,https://publicaccess.glasgow.gov.uk/online-applications/search.do?action=advanced,scotland
+Wirral,https://planning.wirral.gov.uk/online-applications/search.do?action=advanced,wirral,merseyside,england