Speakeasy Stage Company welcomed the Boston premiere of playwright Martyna Majok’s “Cost of Living,” which was awarded the 2018 Pulitzer Prize for Drama, from March 8 to 30 at Roberts Studio Theatre in the Stanford Calderwood Pavilion. With a cast of only four actors, Gina Fonseca (Jess), Stephanie Gould (Ani) and Sean Leviashvili (John) made...