Fix Object.create(null)

[chrisands]

Closes #477

Problem fixed here planttheidea/fast-copy#94

• Add test for Object.create(null)
• Update fast-copy

[mcollina]

lgtm

why the update of fast-copy?

[chrisands]

@mcollina there is an issue #477 which caused pino-pretty crash when it tried to log object that was or contained nullish object with V8 optimization.

Optimized Object.create(null) that is used in fast-querystring

const Empty = function () {};
Empty.prototype = Object.create(null);

The issue was in fast-copy planttheidea/fast-copy#94. After it was resolved I updated so pino-pretty wouldn't crash on such logs.

[mcollina]

lgtm