lib: remove env: node in eslint config for lib files

This patch removes the redundant `require-globals` custom
eslint rule by removing `env: node` in the eslint config
and whitelist the globals that can be accessed in native
modules instead of black listing them. This makes sense
for our `lib/` files because here we are creating the
Node.js environment instead of running in a normal user
land Node.js environment.

PR-URL: https://github.com/nodejs/node/pull/27082
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

lib/buffer.js

@@ -654,9 +654,10 @@ Buffer.prototype.equals = function equals(otherBuffer) {
   return _compare(this, otherBuffer) === 0;
 };
 
+let INSPECT_MAX_BYTES = 50;
 // Override how buffers are presented by util.inspect().
 Buffer.prototype[customInspectSymbol] = function inspect(recurseTimes, ctx) {
-  const max = exports.INSPECT_MAX_BYTES;
+  const max = INSPECT_MAX_BYTES;
   const actualMax = Math.min(max, this.length);
   const remaining = this.length - max;
   let str = this.hexSlice(0, actualMax).replace(/(.{2})/g, '$1 ').trim();
@@ -1089,19 +1090,25 @@ if (internalBinding('config').hasIntl) {
   };
 }
 
-module.exports = exports = {
+module.exports = {
   Buffer,
   SlowBuffer,
   transcode,
-  INSPECT_MAX_BYTES: 50,
-
   // Legacy
   kMaxLength,
   kStringMaxLength
 };
 
-Object.defineProperty(exports, 'constants', {
-  configurable: false,
-  enumerable: true,
-  value: constants
+Object.defineProperties(module.exports, {
+  constants: {
+    configurable: false,
+    enumerable: true,
+    value: constants
+  },
+  INSPECT_MAX_BYTES: {
+    configurable: true,
+    enumerable: true,
+    get() { return INSPECT_MAX_BYTES; },
+    set(val) { INSPECT_MAX_BYTES = val; }
+  }
 });