ArduinoJson 6.15.2
* CMake: don't build tests when imported in another project
* CMake: made project arch-independent
* Visual Studio: fixed error C2766 with flag `/Zc:__cplusplus` (issue #1250)
* Added support for `JsonDocument` to `copyArray()` (issue #1255)
* Added support for `enum`s in `as<T>()` and `is<T>()`  (issue #1256)
* Added `JsonVariant` as an input type for `deserializeXxx()`

ArduinoJson 6.15.1
* Fixed "maybe-uninitialized" warning (issue #1217)
* Fixed "statement is unreachable" warning on IAR (issue #1233)
* Fixed "pointless integer comparison" warning on IAR (issue #1233)
* Added CMake "install" target (issue #1209)
* Disabled alignment on AVR (issue #1231)

ArduinoJson 6.15.0
* Added `DeserializationOption::Filter` (issue #959)
* Added example `JsonFilterExample.ino`
* Changed the array subscript operator to automatically add missing elements
* Fixed "deprecated-copy" warning on GCC 9 (fixes #1184)
* Fixed `MemberProxy::set(char[])` not duplicating the string (issue #1191)
* Fixed enums serialized as booleans (issue #1197)
* Fixed incorrect string comparison on some platforms (issue #1198)
* Added move-constructor and move-assignment to `BasicJsonDocument`
* Added `BasicJsonDocument::garbageCollect()` (issue #1195)
* Added `StaticJsonDocument::garbageCollect()`
* Changed copy-constructor of `BasicJsonDocument` to preserve the capacity of the source.
* Removed copy-constructor of `JsonDocument` (issue #1189)

ArduinoJson 6.14.1
* Fixed regression in UTF16 decoding (issue #1173)
* Fixed `containsKey()` on `JsonVariantConst`
* Added `getElement()` and `getMember()` to `JsonVariantConst`

ArduinoJson 6.14.0
* Added `BasicJsonDocument::shrinkToFit()`
* Added support of `uint8_t` for `serializeJson()`, `serializeJsonPretty()`, and `serializeMsgPack()` (issue #1142)
* Added `ARDUINOJSON_ENABLE_COMMENTS` to enable support for comments (defaults to 0)
* Auto enable support for `std::string` and `std::stream` on modern compilers (issue #1156)

ArduinoJson 6.13.0
* Added support for custom writer/reader classes (issue #1088)
* Added conversion from `JsonArray` and `JsonObject` to `bool`, to be consistent with `JsonVariant`
* Fixed `deserializeJson()` when input contains duplicate keys (issue #1095)
* Improved `deserializeMsgPack()` speed by reading several bytes at once
* Added detection of Atmel AVR8/GNU C Compiler (issue #1112)
* Fixed deserializer that stopped reading at the first `0xFF` (PR #1118 by @mikee47)
* Fixed dangling reference in copies of `MemberProxy` and `ElementProxy` (issue #1120)

ArduinoJson 6.12.0
* Use absolute instead of relative includes (issue #1072)
* Changed `JsonVariant::as<bool>()` to return `true` for any non-null value (issue #1005)
* Moved ancillary files to `extras/` (issue #1011)

ArduinoJson 6.11.5
* Added fallback implementations of `strlen_P()`, `strncmp_P()`, `strcmp_P()`, and `memcpy_P()` (issue #1073)

ArduinoJson 6.11.4
* Added `measureJson()` to the `ArduinoJson` namespace (PR #1069 by @nomis)
* Added support for `basic_string<char, traits, allocator>` (issue #1045)
* Fixed example `JsonConfigFile.ino` for ESP8266
* Include `Arduino.h` if `ARDUINO` is defined (PR #1071 by @nomis)

ArduinoJson 6.11.3
* Added operators `==` and `!=` for `JsonDocument`, `ElementProxy`, and `MemberProxy`
* Fixed comparison of `JsonVariant` when one contains a linked string and the other contains an owned string (issue #1051)

ArduinoJson 6.11.2
* Fixed assignment of `JsonDocument` to `JsonVariant` (issue #1023)
* Fix invalid conversion error on Particle Argon (issue #1035)

ArduinoJson 6.11.1
* Fixed `serialized()` not working with Flash strings (issue #1030)

ArduinoJson 6.11.0
* Fixed `deserializeJson()` silently accepting a `Stream*` (issue #978)
* Fixed invalid result from `operator|` (issue #981)
* Made `deserializeJson()` more picky about trailing characters (issue #980)
* Added `ARDUINOJSON_ENABLE_NAN` (default=0) to enable NaN in JSON (issue #973)
* Added `ARDUINOJSON_ENABLE_INFINITY` (default=0) to enable Infinity in JSON
* Removed implicit conversion in comparison operators (issue #998)
* Added lexicographical comparison for `JsonVariant`
* Added support for `nullptr` (issue #998)

ArduinoJson 6.10.1
* Fixed error "attributes are not allowed on a function-definition"
* Fixed `deserializeJson()` not being picky enough (issue #969)
* Fixed error "no matching function for call to write(uint8_t)" (issue #972)

ArduinoJson 6.10.0
* Fixed an integer overflow in the JSON deserializer
* Added overflow handling in `JsonVariant::as<T>()` and `JsonVariant::is<T>()`.

ArduinoJson 6.9.1
* Fixed warning "unused variable" with GCC 4.4 (issue #912)
* Fixed warning "cast  increases required alignment" (issue #914)
* Fixed warning "conversion may alter value" (issue #914)
* Fixed naming conflict with "CAPACITY" (issue #839)
* Muted warning "will change in GCC 7.1" (issue #914)
* Added a clear error message for `StaticJsonBuffer` and `DynamicJsonBuffer`
* Marked ArduinoJson.h  as a "system header"

ArduinoJson 5.13.5
* Fixed warning "unused variable" with GCC 4.4 (issue #912)
* Fixed warning "maybe uninitialized" (issue #909)
* Added an clear message for `StaticJsonDocument`, `DynamicJsonDocument`...

ArduinoJson 6.9.0
* Decode escaped Unicode characters like \u00DE (issue #304, PR #791)

ArduinoJson 6.8.0-beta
* Import functions in the ArduinoJson namespace to get clearer errors
* Improved syntax highlighting in Arduino IDE
* Removed default capacity of `DynamicJsonDocument`
* `JsonArray::copyFrom()` accepts `JsonArrayConst`
* `JsonVariant::set()` accepts `JsonArrayConst` and `JsonObjectConst`
* `JsonDocument` was missing in the ArduinoJson namespace
* Added `memoryUsage()` to `JsonArray`, `JsonObject`, and `JsonVariant`
* Added `nesting()` to `JsonArray`, `JsonDocument`, `JsonObject`, and `JsonVariant`
* Replaced `JsonDocument::nestingLimit` with an additional parameter

ArduinoJson 6.7.0-beta
* Removed the automatic expansion of `DynamicJsonDocument`, it now has a fixed capacity.
* Restored the monotonic allocator because the code was getting too big
* Reduced the memory usage
* Reduced the code size
* Renamed `JsonKey` to `JsonString`
* Removed spurious files in the Particle library