Fixing bug on name columns (PVO - PPO) and fixing numpy vulnerability…

… issue

Fixing bug on name columns (PVO - PPO) and fixing numpy vulnerability…

… issue

include vectorized option as input parameter

clean code (prospector, black), updated API

Fixing Wrapper bukosabino#204

Adding new indicators (Ulcer Index, Weighted Moving Average, Schaff T…

…rend Cycle, Stochastic RSI, Percentage Price Oscillator, Percentage Volume Oscillator) bukosabino#167; Update wrapper bukosabino#166

fixing bug: min_periods when fillna=False

adding Tenkan-sen and Kijun-sen methods for IchimokuIndicator bukosab…

…ino#156

Fixing bug when dataset with timestamp as index bukosabino#154

adding input parameter donchian channel; speed up tests; adding tests…

…, refactor tests code bukosabino#148, bukosabino#149, bukosabino#150, bukosabino#151