Create 1.2.0 release

node_modules/deprecation/dist-src/index.js

@@ -0,0 +1,14 @@
+export class Deprecation extends Error {
+  constructor(message) {
+    super(message); // Maintains proper stack trace (only available on V8)
+
+    /* istanbul ignore next */
+
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, this.constructor);
+    }
+
+    this.name = 'Deprecation';
+  }
+
+}