fix(commonjs): fix error when bundle contains require() of module with falsy __esModule export
#1850
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Rollup Plugin Name:
commonjsThis PR contains:
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Description
when a file with a falsy export named
__esModuleisrequired the bundle will throwTypeError: Cannot redefine property: __esModule. this fixes the issue by checking for an__esModuleown property instead of checking truthyness.