fix: import * from Joi

[kylealwyn]

import Joi, { JoiObject, SchemaMap } from 'joi'; was compiling incorrectly. We could either switch over to the es6 module resolution strategy or switch our import strategy. Switching import strategy is easier. Tested API locally w/ yalc.

Before

var joi_1 = require("joi")

joi_1.default.object(schema))

After

var Joi = require("joi");

Joi.object(schema)

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@85193a3). Click here to learn what that means.
The diff coverage is 100%.

@@           Coverage Diff           @@
##             master     #6   +/-   ##
=======================================
  Coverage          ?   100%           
=======================================
  Files             ?      1           
  Lines             ?     60           
  Branches          ?     13           
=======================================
  Hits              ?     60           
  Misses            ?      0           
  Partials          ?      0

Impacted Files	Coverage Δ
src/index.ts	100% <100%> (ø)

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