docs: add path-to-regexp update changes to history

HISTORY.md

@@ -3,6 +3,12 @@
 
 This incorporates all changes after 1.3.5 up to 1.3.6.
 
+* deps: `path-to-regexp@6.2.0` (See [release changelog](https://github.com/pillarjs/path-to-regexp/releases/tag/v6.2.0))
+  - Support for **named capturing groups** in paths using `RegExp`, i.e.: `/\/(?<group>.+)/` would result in `req.params.group` being populated.
+  - Custom **prefix and suffix groups** using `{}`, e.g.: `/:entity{-:action}?` would match `/user` and `/user-delete`.
+  - **BREAKING**: Parenthesis and bracket literals now require escaping, i.e.: `/user(:id)` or `/user{:id}` no longer match `/user(42)`, `/user{42}` as before unless written as `/user\\(:id\\)` or `/user\\{:id\\}`.
+  - **BREAKING**: Unbalanced patterns would now produce an error: `/test(foo` previously would worked, now it expects either `(` to be closed or the character to be escaped for the previous behavior, e.g. `/test\\(foo`.
+
 2.0.0-beta.1 / 2020-03-29
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