Release 1.7.0

[George3d6]

Note: Hurrying this up because of weighting hotfix

Lightwood 1.7.0 changelog:

Features:

• Simplified type mapping in Json AI (Remove type mapping #724)
• Setter for neural mixer # epochs (Fixed # epochs for neural mixer #737)
• Improved nan handling (Making sure we don't decode nans #720)
• Drop columns with no information (Drop column with no information #736)
• LightGBM mixer supports weights (Various fixes #749)
• Improved OneHot and Binary encoders' logic around weights (Various fixes #749)
• New accuracy function lookup hierarchy (Dielectron problems #754)
• Better warning logs when nan or inf values are encountered (Dielectron problems #754)

Bug fixes:

• Fixed LightGBM error on CPU (Lgbm GPU hotfix #726)
• Cast TS group by values to string to avoid TypeError (Fix: cast TS group by values to string to avoid TypeError #727)
• Check target values when transforming time series if task requires them (Fix: check target values when transforming time series if task requires them #747)
• Streamline encode/decode in TsArrayNumericEncoder (Fix #738 #748)
• target_weights argument is now used properly (Various fixes #749)
• Use custom R2 accuracy to account for edge cases (Dielectron problems #754)
• Fixed target dropping behavior (Dielectron problems #754)

Other

• Update README.md example (Update README.md example #731)
• Separate branch for docs (Separate doc branch #740)
• Docs for image and audio encoders; LightGBM and LinearRegression mixers (More docs: image and audio encoders; LightGBM mixer #721, Documentation for the linear regression #722)