update CHANGELOG and osrm version in package.json for v5.20.0

CHANGELOG.md

@@ -1,3 +1,7 @@
+# UNRELEASED
+  - Changes from 5.20.0
+    - Features:
+      - ADDED: all waypoints in responses now contain a distance property between the original coordinate and the snapped location. [#5255](https://github.com/Project-OSRM/osrm-backend/pull/5255)
 # 5.20.0
   - Changes from 5.19.0:
     - Table:

package.json

@@ -1,6 +1,6 @@
 {
   "name": "osrm",
-  "version": "5.20.0",
+  "version": "5.20.0-latest.1",
   "private": false,
   "description": "The Open Source Routing Machine is a high performance routing engine written in C++14 designed to run on OpenStreetMap data.",
   "dependencies": {