Upgrade to the latest version of detect-libc

libc family detection uses the non-blocking Report API where
available (Node.js 12+) otherwise spawns a single child process

lib/util/versioning.js

@@ -302,7 +302,7 @@ module.exports.evaluate = function(package_json, options, napi_build_version) {
     target_platform: options.target_platform || process.platform,
     arch: options.target_arch || process.arch,
     target_arch: options.target_arch || process.arch,
-    libc: options.target_libc || detect_libc.family || 'unknown',
+    libc: options.target_libc || detect_libc.familySync() || 'unknown',
     module_main: package_json.main,
     toolset: options.toolset || '', // address https://github.com/mapbox/node-pre-gyp/issues/119
     bucket: package_json.binary.bucket,

package.json

@@ -20,7 +20,7 @@
   "bin": "./bin/node-pre-gyp",
   "main": "./lib/node-pre-gyp.js",
   "dependencies": {
-    "detect-libc": "^1.0.3",
+    "detect-libc": "^2.0.0",
     "https-proxy-agent": "^5.0.0",
     "make-dir": "^3.1.0",
     "node-fetch": "^2.6.5",

test/versioning.test.js

@@ -125,7 +125,7 @@ test('should detect libc', (t) => {
     }
   };
   const opts = versioning.evaluate(mock_package_json, { module_root: '/root' });
-  const expected_libc_token = detect_libc.family || 'unknown';
+  const expected_libc_token = detect_libc.familySync() || 'unknown';
   t.comment('performing test with the following libc token: ' + expected_libc_token);
   t.equal(opts.module_path, path.normalize('/root/lib/binding/test-' + expected_libc_token));
   t.equal(opts.module, path.normalize('/root/lib/binding/test-' + expected_libc_token + '/test.node'));