deps: upgrade npm to 6.1.0

PR-URL: https://github.com/nodejs/node/pull/20190
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/deps/npm/node_modules/ajv/lib/compile/error_classes.js b/deps/npm/node_modules/ajv/lib/compile/error_classes.js
new file mode 100644
index 0000000000..0b0ec4e4e3
--- /dev/null
+++ b/deps/npm/node_modules/ajv/lib/compile/error_classes.js
@@ -0,0 +1,34 @@
+'use strict';
+
+var resolve = require('./resolve');
+
+module.exports = {
+  Validation: errorSubclass(ValidationError),
+  MissingRef: errorSubclass(MissingRefError)
+};
+
+
+function ValidationError(errors) {
+  this.message = 'validation failed';
+  this.errors = errors;
+  this.ajv = this.validation = true;
+}
+
+
+MissingRefError.message = function (baseId, ref) {
+  return 'can\'t resolve reference ' + ref + ' from id ' + baseId;
+};
+
+
+function MissingRefError(baseId, ref, message) {
+  this.message = message || MissingRefError.message(baseId, ref);
+  this.missingRef = resolve.url(baseId, ref);
+  this.missingSchema = resolve.normalizeId(resolve.fullPath(this.missingRef));
+}
+
+
+function errorSubclass(Subclass) {
+  Subclass.prototype = Object.create(Error.prototype);
+  Subclass.prototype.constructor = Subclass;
+  return Subclass;
+}