PlatformIO Core 5.2.4 is out!
- Added support for a new 
headersfield in library.json (declare a list of header files that can be included in a project source files using#include <...>directive) - Improved tab completion support for Bash, ZSH, and Fish shells (issue #4114)
 - Improved support for projects located on a network share (issue #3417, issue #3926, issue #4099)
 - Improved PIO Remote setup on credit-card sized computers (Raspberry Pi, BeagleBon, etc) (issue #3865)
 - Upgraded build engine to the SCons 4.3 (release notes)
 - Fixed an issue with the CLion project generator when a macro contains a space (issue #4102)
 - Fixed an issue with the NetBeans project generator when the path to PlatformIO contains a space (issue #4096)
 - Fixed an issue when the system environment variable does not override a project configuration option (issue #4125)
 - Fixed an issue when referencing 
*_diroption from a custom project configuration environment (issue #4110) - Fixed an issue with the CLion template that generated a broken CMake file if userβs home directory contained an unescaped backslash (issue #4071)
 - Fixed an issue with wrong detecting Windows architecture when Python 32bit is used (issue #4134)
 
See PlatformIO 5.2.4 Release Notes for details.
Upgrade
- PlatformIO IDE: Left Sidebar > PlatformIO (icon) > Quick Access > Upgrade PlatformIO Core
 - 
Terminal: Please run 
pio upgradecommand in terminal. 
Regards,
Your friends at PlatformIO