v0.5.0

• (Enhancement) Add |> syntactic sugar for building learning networks. Requires julia 1.3 (#228, #231)
• (Enhancement) Add matching method to streamline model search, without constructing MLJTask objects with supervised or unsupervised (the existing task constructors are to remain but be ultimately depreciated or replaced) (#236, PR #238)
• (Mildly breaking) Change the method name train_eval_pairs for custom resampling strategies to train_test_pairs, which is less confusing. Update the manual accordingly. Unlikely to affect any users yet (#244)
• (Enhancement, mildly breaking) Update MLJModels requirement to v0.5.0 to make available most scikit-learn classifiers, KNNClassifier and new improved version of KNNRegressor. As KNNRegressor is no longer an MLJ built-in model, code must be explicitly imported with @load KNNRegressor before instantiating. Do models() to get up-do-date list of all models (MLJModels PR #60, MLJModels PR #47)