Fix fixer.io example, the free plan doesn't support SSL
Fix fixer.io example, the free plan doesn't support SSL

josdejong/mathjs,FSMaxB/mathjs,josdejong/mathjs,josdejong/mathjs,FSMaxB/mathjs,FSMaxB/mathjs,josdejong/mathjs,FSMaxB/mathjs,FSMaxB/mathjs,josdejong/mathjs