feat: add a first generic method, square (#10)

Resolves #2.

Reviewed-on: #10
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>

src/generic/__test__/arithmetic.spec.js

@@ -0,0 +1,11 @@
+import assert from 'assert'
+import math from '#nanomath'
+
+describe('generic arithmetic', () => {
+   it('squares anything', () => {
+      assert.strictEqual(math.square(7), 49)
+      assert.strictEqual(
+         math.square.resolve([math.types.Number]).returns,
+         math.types.Number)
+   })
+})