It took eight innings, but Libertyville knocked off Maine South 7-6 on Saturday at Slammers Stadium in Joliet to secure back-to-back Class 4A state championships. The Wildcats are the first local team to win consecutive 4A titles since Providence pulled off the feat in 2016. Matt Thompson’s squad is 67-14 over the past two seasons. Libertyville’s deep, talented lineup came back from 3-0 and 5-2 deficits to pick up the win. “I never stopped belie…