feat: Add return typing strategies and implement sqrt with them (#26)

Resolves #25

Reviewed-on: #26
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>

src/generic/__test__/arithmetic.spec.js

@@ -1,11 +1,18 @@
 import assert from 'assert'
 import math from '#nanomath'
+import {ReturnTyping} from '#core/Type.js'
+
+const {Complex, NumberT} = math.types
 
 describe('generic arithmetic', () => {
    it('squares anything', () => {
-      assert.strictEqual(math.square(7), 49)
-      assert.strictEqual(
-         math.square.resolve([math.types.NumberT]).returns,
-         math.types.NumberT)
+      const sq = math.square
+      assert.strictEqual(sq(7), 49)
+      assert.strictEqual(math.square.resolve([NumberT]).returns, NumberT)
+      assert.deepStrictEqual(sq(math.complex(3, 4)), math.complex(-7, 24))
+      const eyes = math.complex(0, 2)
+      assert.strictEqual(sq(eyes), -4)
+      const sqFull = math.square.resolve(Complex(NumberT), ReturnTyping.full)
+      assert.deepStrictEqual(sqFull(eyes), math.complex(-4, 0))
    })
 })