feat: implicit convert BooleanT to NumberT

Also adds implicit conversion configuration option to Type constructor,
  and institutes a numbers-only bundle, and supports argument matching
  with implicit conversions.

  Still need to test that a behavior that invokes implicit conversion ends up
  with the conversion operation as a dependency (and so regenerates itself if
  the conversion changes).

src/__test__/numbers.spec.js

@@ -0,0 +1,9 @@
+import assert from 'assert'
+import math from '../numbers.js'
+
+describe('the numbers-only bundle', () => {
+   it('works like regular on number-only functions', () => {
+      assert.strictEqual(math.quotient(5, 3), 1)
+      assert.strictEqual(math.square(-3), 9)
+   })
+})