matheusfcorocher

fix: prevent string input to be used in allocate function

1

## How was it solved? It was fixed by adding a condition that verifies if ratio is numeric and has number type in areValidRatios function. Refs: #588

## What github issue is this PR for, if any? Fix unsafety detected by issue https://github.com/mapbox/csv2geojson/issues/73 ## What changed, and why? * Was removed `parse` function and replace by `parseRows`...