test: move the tzdb version test into tests/ so npm test runs it

test/tzdb.test.js

@@ -1,9 +0,0 @@
-import test from 'tape'
-import spacetime from './lib/index.js'
-import { tzdbVersion } from '../zonefile/iana.js'
-
-test('tzdb version', (t) => {
-  t.ok(/^\d{4}[a-z]+$/.test(spacetime.tzdbVersion), `looks like '2026c'`)
-  t.equal(spacetime.tzdbVersion, tzdbVersion, 'same as zonefile/iana.js')
-  t.end()
-})