Fix skipped tests

[msoedov]

Currently a bunch of tests are skipped due small breaking changes

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1) SKIP: test_generate_map (tests.test_core.TestGenerate)
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   No Traceback
   Exception: changed api
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2) SKIP: test_generate_map_complex (tests.test_core.TestGenerate)
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   No Traceback
   Exception: changed api
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3) SKIP: test_generate_map_nested_gen (tests.test_core.TestGenerate)
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   No Traceback
   Exception: changed api
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4) SKIP: test_generate_set (tests.test_core.TestGenerate)
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   No Traceback
   Exception: changed api
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5) SKIP: test_generate_tuple (tests.test_core.TestGenerate)
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   No Traceback
   Exception: changed api
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6) SKIP: test_unknown (tests.test_core.TestGenerate)
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   No Traceback
   Exception: changed api
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