bump version and add to changelog

CHANGELOG.md

@@ -1,3 +1,18 @@
+# v1.20.0
+
+## What's Changed
+
+### Bugfixes
+* Bug-Fix: Pass verbosity to the harness and sandbox by @tzaffi in https://github.com/algorand/js-algorand-sdk/pull/630
+
+### Enhancements
+* Enhancement: Use sandbox for SDK Testing and remove Indexer v1 steps by @algochoi in https://github.com/algorand/js-algorand-sdk/pull/623
+* Tidy:  Ignore algorand-sdk-testing test-harness dir by @michaeldiamant in https://github.com/algorand/js-algorand-sdk/pull/634
+* Enhancement: Deprecating use of langspec by @ahangsu in https://github.com/algorand/js-algorand-sdk/pull/632
+* enhancement: Initial stateproofs support by @Eric-Warehime in https://github.com/algorand/js-algorand-sdk/pull/629
+
+**Full Changelog**: https://github.com/algorand/js-algorand-sdk/compare/v1.19.1...v1.20.0
+
 # v1.20.0-beta.1
 
 ## What's Changed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "algosdk",
-  "version": "1.20.0-beta.1",
+  "version": "1.20.0",
   "description": "The official JavaScript SDK for Algorand",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",