v4.2.0

• fix typo ab38131
• feat(): update library version d573e31
• Add setApplicationMuted and setApplicationVolume methods (#228) e3a7b15
• Fixed typo 19acd57
• fix(ios): prepare method return adUnitId (#223) e16408c
• chore 4a363a2

v4.1.0...v4.2.0