v0.13.0

• Drop python 2.7 support (#568)
• Fixed bugs
  • Fix cache in friedrich_coefficients and agg_linear_trend (#593)
  • Added a check for wrong column names and a test for this check (#586)
  • Make sure to not install the tests folder (#599)
  • Make sure there is at least a single column which we can use for data (#589)
  • Avoid division by zero in energy_ratio_by_chunks (#588)
  • Ensure that get_moment() uses float computations (#584)
  • Preserve index when column_value and column_kind not provided (#576)
  • Add @set_property("input", "pd.Series") when needed (#582)
  • Fix off-by-one error in longest strike features (fixes #577) (#578)
  • Add set_property import (#572)
  • Fix typo (#571)
  • Fix indexing of melted normalized input (#563)
  • Fix travis (#569)
• Remove warnings (#583)
• Update to newest python version (#594)
• Optimizations
  • Early return from change_quantiles if ql >= qh (#591)
  • Optimize mean_second_derivative_central (#587)
  • Improve performance with Numpy's sum function (#567)
  • Optimize mean_change (fixes issue #542) and correct documentation (#574)