Rename inspect methods

[yousefamar]

We were getting a weird crash at me-box/databox#4, and found the source after some sleuthing. To recreate:

new require('dockerode')().createNetwork({
	Name: 'n1',
	Driver: 'bridge'
})
.then((res)=>{
	console.log(res.toString());
})
.catch((err)=>{
	console.log('[ERROR]', err);
});

It turns out that .inspect() is reserved by Node, akin to .toString(), and is called when you try to log an object that implements it, and for debugging. This has caused issues in the past.

Now clearly things like Networks and Containers aren't meant to be console.log'd, and renaming the inspect methods would break backwards compatibility, but thought I should let you know anyway, and if you decide to rename them is up to you.

[yousefamar]

Alternatively, according to the docs, I believe you can also suppress this bug by adding a symbol-based inspect method to the classes, as that takes precedence, similar to this:

const util = require('util');
Network.prototype[util.inspect.custom] = function() { return this; };