message: Adjust Gardens by the Bay and Delta Works requirements
diff: <Advisor>ADVISOR_GROWTH</Advisor>
  <ArtDefineTag>ART_DEF_BUILDING_DELTA_WORKS</ArtDefineTag>
  <MaxStartEra>ERA_DIGITAL</MaxStartEra>
  - <PrereqTech>TECH_AUTOMATION</PrereqTech>
  + <PrereqTech>TECH_RENEWABLE_ENERGY</PrereqTech>
  <GreatPeopleUnitClass>UNITCLASS_GREAT_ENGINEER</GreatPeopleUnitClass>
  <iGreatPeopleRateChange>2</iGreatPeopleRateChange>
  <bTeamShare>1</bTeamShare>
  <Advisor>ADVISOR_ECONOMY</Advisor>
  <ArtDefineTag>ART_DEF_BUILDING_GARDENS_BY_THE_BAY</ArtDefineTag>
  <MaxStartEra>ERA_DIGITAL</MaxStartEra>
  - <PrereqTech>TECH_BIOTECHNOLOGY</PrereqTech>
  + <PrereqTech>TECH_ECOLOGY</PrereqTech>
  <GreatPeopleUnitClass>UNITCLASS_GREAT_ARTIST</GreatPeopleUnitClass>
  <iGreatPeopleRateChange>2</iGreatPeopleRateChange>
  <bTeamShare>1</bTeamShare>
  <bNukeImmune>1</bNukeImmune>
  <bWater>1</bWater>
  - <iCost>2500</iCost>
  + <iCost>2000</iCost>
  <iHurryCostModifier>200</iHurryCostModifier>
  <iAdvancedStartCost>-1</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  