Stop using node: imports

This was causing issues when the code was included in a server bundle.
The errors looked like this:

Module build failed: UnhandledSchemeError: Reading from "node:os" is not
handled by plugins (Unhandled scheme).
Webpack supports "data:" and "file:" URIs by default.
You may need an additional plugin to handle "node:" URIs.

src/declaration/binary.ts

@@ -1,4 +1,4 @@
-import { Buffer } from "node:buffer";
+import { Buffer } from "buffer";
 import {
   createLengthConstraint,
   type LengthConstraintSpec,

src/environment.ts

@@ -1,4 +1,4 @@
-import { EOL } from "node:os";
+import { EOL } from "os";
 import { render as renderSpecification } from "./specification.js";
 import { render as renderSummary } from "./summary.js";
 import { Results, validate } from "./validation.js";

src/specification.ts

@@ -1,4 +1,4 @@
-import { basename } from "node:path";
+import { basename } from "path";
 import { extrinsicConstraints, type Constraint } from "./constraint.js";
 import { createDisjunctionFormatter } from "./list.js";
 import { code, inlineCode, italic, list, strong, table } from "./markdown.js";

src/table.ts

@@ -1,4 +1,4 @@
-import { EOL } from "node:os";
+import { EOL } from "os";
 
 const segmenter = new Intl.Segmenter();
 

test/helpers.ts

@@ -1,5 +1,5 @@
-import { Console } from "node:console";
-import { Transform } from "node:stream";
+import { Console } from "console";
+import { Transform } from "stream";
 import { Mock, vi } from "vitest";
 
 export function noop() {

test/suite/declaration/binary.spec-d.ts

@@ -1,4 +1,4 @@
-import { Buffer } from "node:buffer";
+import { Buffer } from "buffer";
 import { describe, expectTypeOf, it } from "vitest";
 import { binary, initialize } from "../../../src/index.js";
 import { noop } from "../../helpers.js";

test/suite/declaration/binary.spec.ts

@@ -1,4 +1,4 @@
-import { Buffer } from "node:buffer";
+import { Buffer } from "buffer";
 import { beforeEach, describe, expect, it } from "vitest";
 import { Declaration } from "../../../src/declaration.js";
 import { Options } from "../../../src/declaration/binary.js";

test/suite/specification.spec.ts

@@ -1,6 +1,6 @@
 import { Temporal } from "@js-temporal/polyfill";
-import { join } from "node:path";
-import { fileURLToPath } from "node:url";
+import { join } from "path";
+import { fileURLToPath } from "url";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import { registerVariable } from "../../src/environment.js";
 import {

test/suite/summary.spec.ts

@@ -1,6 +1,6 @@
 import { Temporal } from "@js-temporal/polyfill";
-import { join } from "node:path";
-import { fileURLToPath } from "node:url";
+import { join } from "path";
+import { fileURLToPath } from "url";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import { registerVariable } from "../../src/environment.js";
 import {