* Fixed CIO WebSockets client incorrectly sends Sec-WebSocket-Extensions header even if empty regression ([KTOR-2388](https://youtrack.jetbrains.com/issue/KTOR-2388))
* Updated serialization version to 1.2.2 ([KTOR-2968](https://youtrack.jetbrains.com/issue/KTOR-2968))
* Made code example complete in OAuth documentation([KTOR-1415](https://youtrack.jetbrains.com/issue/KTOR-1415))
* Added quick action on a Application.module(...) to generate tests for a given module with all the endpoints in plugin ([KTOR-2411](https://youtrack.jetbrains.com/issue/KTOR-2411))
* Fixed kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen <object>@72c18 ([KTOR-2883](https://youtrack.jetbrains.com/issue/KTOR-2883))
* Fixed 404 errors in ktor docs ([KTOR-2915](https://youtrack.jetbrains.com/issue/KTOR-2915))
* Added prometeus version to Ktor docs ([KTOR-2015](https://youtrack.jetbrains.com/issue/KTOR-2015))
* Fixed incorrect Structured Markup (LD+JSON) on Ktor docs ([KTOR-2943](https://youtrack.jetbrains.com/issue/KTOR-2943))
* Fixed embedded Netty Server with watch paths is crashing in API level 22 when calling stopping server ([KTOR-1613](https://youtrack.jetbrains.com/issue/KTOR-1613))
* Fixed NoSuchMethodError: No virtual method getParameterCount on Android API 25 and lower regression ([KTOR-2924](https://youtrack.jetbrains.com/issue/KTOR-2924))
* Fixed X-Forwarded-Port Parse Exception when it contains comma separated list of ports regression ([KTOR-2918](https://youtrack.jetbrains.com/issue/KTOR-2918))
* Made CookieConfiguration default to secure configuration and require user opt-out long-standing ([KTOR-628](https://youtrack.jetbrains.com/issue/KTOR-628))
* Updated docs section about testing with cookies ([KTOR-273](https://youtrack.jetbrains.com/issue/KTOR-273))
* Fixed "ApplicationEngineEnvironment was not started" when accessing application before server is started ([KTOR-1854](https://youtrack.jetbrains.com/issue/KTOR-1854))
* Fixed NPE in ApacheRequestProducer when "http://" is requested ([KTOR-1405](https://youtrack.jetbrains.com/issue/KTOR-1405))
* Updated vulnerable versions from sonatype report ([KTOR-2875](https://youtrack.jetbrains.com/issue/KTOR-2875))
* Fixed ByteReadChannel.readUTF8Line() indefinitely returns empty lines when `\r` is not followed by `\n` ([KTOR-2868](https://youtrack.jetbrains.com/issue/KTOR-2868))
