Prep beta 3 (#306)

* Prep beta 3

Author: nmuesch

CHANGELOG.md

@@ -1,5 +1,21 @@
 # CHANGELOG
 
+## v1.0.0-beta.3 / 2020-05-21
+
+* [BREAKING] Update to openapi-generator 5.0.0. See [#303](https://github.com/DataDog/datadog-api-client-go/pull/303).
+    * This change includes backwards incompatible changes when using structs generated from `oneOf` schemas.
+* [Added] Add SIEM and SNMP usage API. See [#309](https://github.com/DataDog/datadog-api-client-go/pull/309).
+* [Added] Add security monitoring to clients. See [#304](https://github.com/DataDog/datadog-api-client-go/pull/304).
+* [Added] Add /v1/validate endpoint. See [#290](https://github.com/DataDog/datadog-api-client-go/pull/290).
+* [Added] Add generated_files file. See [#270](https://github.com/DataDog/datadog-api-client-go/pull/270).
+* [Fixed] Add authentication to Go examples. See [#299](https://github.com/DataDog/datadog-api-client-go/pull/299).
+* [Fixed] Add 422 error codes to users and roles v2 endpoints. See [#296](https://github.com/DataDog/datadog-api-client-go/pull/296).
+* [Fixed] Update import in Go examples. See [#295](https://github.com/DataDog/datadog-api-client-go/pull/295).
+* [Fixed] Check duplicate object definitions. See [#288](https://github.com/DataDog/datadog-api-client-go/pull/288).
+* [Fixed] Mark unstable endpoints with beta note. See [#281](https://github.com/DataDog/datadog-api-client-go/pull/281).
+* [Changed] Update ServiceLevelObjective schema names. See [#279](https://github.com/DataDog/datadog-api-client-go/pull/279).
+* [Deprecated] Add deprecated fields `logset`, `count` and `start` to appropriate dashboard widgets. See [#285](https://github.com/DataDog/datadog-api-client-go/pull/285).
+
 ## v1.0.0-beta.2 / 2020-05-04
 
 * [Added] Add RUM Monitor Type and update documentation. See [#273](https://github.com/DataDog/datadog-api-client-go/pull/273).

version.go

@@ -1,4 +1,4 @@
 package client
 
 // Version used in User-Agent header.
-const Version = "1.0.0-beta.2"
+const Version = "1.0.0-beta.3"