ArduinoJson 5.8.1
* Fixed error when assigning a `volatile int` to a `JsonVariant` (issue #415)
* Fixed errors with Variable Length Arrays (issue #416)
* Fixed error when both `ARDUINOJSON_ENABLE_STD_STREAM` and `ARDUINOJSON_ENABLE_ARDUINO_STREAM` are set to `1`
* Fixed error "Stream does not name a type" (issue #412)

ArduinoJson 5.8.0
* Added operator `==` to compare `JsonVariant` and strings (issue #402)
* Added support for `Stream` (issue #300)
* Reduced memory consumption by not duplicating spaces and comments

ArduinoJson 5.7.3
* Added an `printTo(char[N])` and `prettyPrintTo(char[N])` (issue #292)
* Added ability to set a nested value like this: `root["A"]["B"] = "C"` (issue #352)
* Renamed `*.ipp` to `*Impl.hpp` because they were ignored by Arduino IDE (issue #396)

ArduinoJson 5.7.2
* Made PROGMEM available on more platforms (issue #381)
* Fixed PROGMEM causing an exception on ESP8266 (issue #383)

ArduinoJson 5.7.1
* Added support for PROGMEM (issue #76)
* Fixed compilation error when index is not an `int` (issue #381)

ArduinoJson 5.7.0
* Templatized all functions using `String` or `std::string`
* Removed `ArduinoJson::String`
* Removed `JsonVariant::defaultValue<T>()`
* Removed non-template `JsonObject::get()` and `JsonArray.get()`
* Fixed support for `StringSumHelper` (issue #184)
* Replaced `ARDUINOJSON_USE_ARDUINO_STRING` by `ARDUINOJSON_ENABLE_STD_STRING` and `ARDUINOJSON_ENABLE_ARDUINO_STRING` (issue #378)
* Added example `StringExample.ino` to show where `String` can be used
* Increased default nesting limit to 50 when compiled for a computer (issue #349)

ArduinoJson 5.6.7
* Fixed `array[idx].as<JsonVariant>()` and `object[key].as<JsonVariant>()`
* Fixed return value of `JsonObject::set()` (issue #350)
* Fixed undefined behavior in `Prettyfier` and `Print` (issue #354)
* Fixed parser that incorrectly rejected floats containing a `+` (issue #349)

ArduinoJson 5.6.6
* Fixed `-Wparentheses` warning introduced in v5.6.5 (PR #335 by @nuket)
* Added `.mbedignore` for ARM mbdeb (PR #334 by @nuket)
* Fixed  `JsonVariant::success()` which didn't propagate `JsonArray::success()` nor `JsonObject::success()` (issue #342).

ArduinoJson 5.6.5
* `as<char*>()` now returns `true` when input is `null` (issue #330)

ArduinoJson 5.6.4
* Fixed error in float serialization (issue #324)

ArduinoJson 5.6.3
* Improved speed of float serialization (about twice faster)
* Added `as<JsonArray>()` as a synonym for `as<JsonArray&>()`... (issue #291)
* Fixed `call of overloaded isinf(double&) is ambiguous` (issue #284)

ArduinoJson 5.6.2
* Fixed build when another lib does `#undef isnan` (issue #284)

ArduinoJson 5.6.1
* Added missing `#pragma once` (issue #310)

ArduinoJson 5.6.0
* ArduinoJson is now a header-only library (issue #199)

ArduinoJson 5.5.1
* Fixed compilation error with Intel Galileo (issue #299)

ArduinoJson 5.5.0
* Added `JsonVariant::success()` (issue #279)
* Renamed `JsonVariant::invalid<T>()` to `JsonVariant::defaultValue<T>()`

ArduinoJson 5.4.0
* Changed `::String` to `ArduinoJson::String` (issue #275)
* Changed `::Print` to `ArduinoJson::Print` too

ArduinoJson 5.3.0
* Added custom implementation of `ftoa` (issues #266, #267, #269 and #270)
* Added `JsonVariant JsonBuffer::parse()` (issue #265)
* Fixed `unsigned long` printed as `signed long` (issue #170)

ArduinoJson 5.2.0
* Added `JsonVariant::as<char*>()` as a synonym for `JsonVariant::as<const char*>()` (issue #257)
* Added example `JsonHttpClient` (issue #256)
* Added `JsonArray::copyTo()` and `JsonArray::copyFrom()` (issue #254)
* Added `RawJson()` to insert pregenerated JSON portions (issue #259)

ArduinoJson 5.1.1
Removed `String` duplication when one replaces a value in a `JsonObject` (PR #232 by @ulion)