Add in change log (#1673)

docs/_docs/testnet/changelog.md

@@ -2,6 +2,48 @@
 ---
 # Ten Testnet Change Log
 
+# Oct 2023-11-29 (v0.20.0)
+* A list of the PRs merged in this release is as below;
+    * `c3775b52` Contract deploy: record l2 contract addresses (#1667)
+    * `23107b72` Add another signed message format gateway (#1672)
+    * `5bf20d97` L1 contracts: increase timeout for extra transactions (#1671)
+    * `1d08a78b` Proxy contracts deployment (#1663)
+    * `f6c7c1b9` Add token as query param (#1666)
+    * `34221a57` Local network: pass mgmt contract to l2 contract deploy script (#1664)
+    * `3af59e76` Add default user for old endpoints (#1665)
+    * `378aec67` Use eth sign typed data v4 in gateway (#1643)
+    * `8712e26d` Obscuroscan#2323 (#1640)
+    * `d37c0c78` Remove creating all clients at startup (#1662)
+    * `f5d4ddd6` Contract deployment: store important addresses (#1653)
+    * `12480861` Host: monitor and serve important contract addresses (#1645)
+    * `29cae5df` Adding tx hash to the faucet funding (#1660)
+    * `8c83d5e3` Fix json serialisation for batch (#1655)
+    * `e0e082db` Fix the repository dispatches to ten-protocol/ten-test after the repo renaming  (#1658)
+    * `e8b7b50f` Prevent concurrent writes to a websocket connection (#1656)
+    * `43214832` Fix the msg bus deploy at genesis (#1652)
+    * `0b47af67` Added another promote to admin (#1651)
+    * `309b2405` Replacing github links (#1647)
+    * `0ec2d053` Rebranding .md files (#1648)
+    * `bb3a2bd2` Ui: replace obscuro logos with ten (#1649)
+    * `35b5ce45` Change base url to https (#1644)
+    * `ef01370c` Adding geths mempool (#1639)
+    * `82488783` Fix test ports (#1642)
+    * `991a2d67` Integrate google analytics for og and obscuroscan (#1638)
+    * `9e3cf212` Gateway unsubscribe for multiple subscribed clients (#1637)
+    * `e7ab386b` Gateway fixes (#1633)
+    * `47bb9e65` Obscuroscan: serve oldest batches first (#1635)
+    * `1d4e8d74` Subscribe to events with multiple accounts and deduplicate (#1627)
+    * `5c3fc3cd` Obscuroscan: metamask button show connected (#1634)
+    * `aae2f5fc` Return error instead of just logging it if client fails (#1632)
+    * `fb4c4492` Cais ui updates (#1631)
+    * `97ed3c31` Obscuroscan: small ui tweaks (#1630)
+    * `f6ac73a0` Update readme.md (#1613)
+    * `7399892f` Missed a couple of vars on the rename (#1629)
+    * `bddbf713` Obscuroscan: load eth price on init (#1626)
+    * `06e56bdd` Preparation for subscribing with multiple accounts and test that confirms current issues (#1516)
+    * `a96105d9` Obscuroscan: favicon, title, align icons (#1625)
+    * `9a370655` Respond with latest for 'pending' block number requests (#1623)
+
 # Oct 2023-10-26 (v0.19.0)
 * A list of the PRs merged in this release is as below;
   * `9eb4dd0e` Contract changes for storing addresses (#1622)