fix: update test import

Author: notanengineercom

spec/regression/Arguments.spec.ts

@@ -1,6 +1,6 @@
 import test from 'ava'
 import { Arg } from '../../src'
-import { Argument } from '../../src/Arguments'
+import { Argument } from '../../src/shared'
 
 const testObject = { "foo": "bar" }
 const testArray = ["a", 1, true]
@@ -107,4 +107,4 @@ test('should not match the argument with the predicate function using Arg.is.not
 
   t.true(Arg.is.not<string>(x => x === 'foo').matches('bar'))
   t.true(Arg.is.not<number>(x => x % 2 == 0).matches(3))
-})
+})