d3-quarterly v1.0.0

d3-quarterly

## 2017 Ændrew Rininsland

Based off block by Chris Vaiu

d3-quarterly will parse a "quarter" string (e.g., "Q3 2017") and return a date object, indicating either the lower or upper bounds of a quarter.

Usage

1. $ npm install d3-quarterly
2. import quarterly from 'd3-quarterly'

3. test('General use', t => {
     const lower = quarterly('Q1 2017', false);
     const upper = quarterly('Q1 2017', true);
     t.is(lower.toISOString(), '2017-01-01T00:00:00.000Z');
     t.is(upper.toISOString(), '2017-03-31T23:59:59.999Z');
   });

### API

1. `quarterly(quarterString: string, returnBoundsEnd: boolean = false)`
    * quarterString
      - A string in the format 'QN YY(YY)?' where "N" is an integer 1-4 (incl.) and "YY(YY)?" is either a 2- or 4-integer year value

    * returnBoundsEnd
      - By default returns the lower bounds (i.e., the start) of a quarter. Pass `true` to return the upper bounds.