It’s been a while, but the squirrel finally clawed his way to its nut. Jeff McNeil’s go-ahead solo homer in the bottom of the sixth inning propelled the Mets to a series victory over the Chicago Cubs Wednesday night at Citi Field, taking the rubber match, 4-3. The 31-year-old’s homer off of Hayden Wesneski was his second since June 13 and fifth of the season.