Update Unity tool to 2.4.3

HISTORY.rst

@@ -17,6 +17,7 @@ PlatformIO 3.0
   `description <http://docs.platformio.org/en/latest/projectconf/section_platformio.html#description>`_
   option for `Project Configuration File "platformio.ini" <http://docs.platformio.org/page/projectconf/section_platformio.html#build-dir>`__ (information will be used by
   `PlatformIO Home <http://docs.platformio.org/page/home/index.html>`_)
+* Updated Unity tool to 2.4.3
 * Fixed issue with useless project rebuilding for case insensitive file
   systems (Windows)
 * Fixed issue with ``build_unflags`` option when a macro contains value

platformio/managers/core.py

@@ -24,7 +24,7 @@ CORE_PACKAGES = {
     "contrib-piohome": ">=0.9.1,<2",
     "contrib-pysite": ">=0.2.0,<2",
     "tool-pioplus": ">=1.1.2,<2",
-    "tool-unity": "~1.20302.1",
+    "tool-unity": "~1.20403.0",
     "tool-scons": "~2.20501.4"
 }