feat: config and approximate equality (#19)

Establishes a global config object for a TypeDispatcher instance, so far
  with just properties representing comparison tolerances. Begins a
  "relational" group of functions with basic approximate equality, and
  an initial primitive ordering comparison. Ensures that methods that
  depend on properties of `config` will be properly updated when those
  properties change.

Reviewed-on: #19
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>

src/boolean/BooleanT.js

@@ -1,3 +1,6 @@
 import {Type} from '#core/Type.js'
 
-export const BooleanT = new Type(n => typeof n === 'boolean')
+export const BooleanT = new Type(n => typeof n === 'boolean', {
+   zero: false,
+   one: true
+})