Audiences are going bananas for Universal Pictures’ and Illumination’s “Despicable Me 4.” The latest installment in the popular family film franchise opened to $27 million Wednesday at the US domestic box office, according to estimates from a studio source and measurement firm Comscore. That number is expected to rise to roughly $120 million by the end of the Fourth of July holiday weekend. Other titles vying for moviegoers’ business this holiday stretch are Disney and Pixar’s “Inside Out 2,” which grossed $7.3 million on Wednesday for a North American cumulative of $496.6 million; Paramount P…