Build travis02 and travis03 with latest platform

code/platformio.ini

@@ -18,6 +18,7 @@ platform_150 = espressif8266@1.5.0
 platform_160 = espressif8266@1.6.0
 platform_173 = espressif8266@1.7.3
 platform_180 = espressif8266@1.8.0
+platform_latest = ${common.platform_180}
 platform = ${common.platform_150}
 
 # ------------------------------------------------------------------------------
@@ -193,7 +194,7 @@ monitor_speed = ${common.monitor_speed}
 extra_scripts = ${common.extra_scripts}
 
 [env:travis02]
-platform = ${common.platform_173}
+platform = ${common.platform_latest}
 framework = ${common.framework}
 board = ${common.board_4m}
 board_build.flash_mode = ${common.flash_mode}
@@ -204,7 +205,7 @@ monitor_speed = ${common.monitor_speed}
 extra_scripts = ${common.extra_scripts}
 
 [env:travis03]
-platform = ${common.platform_173}
+platform = ${common.platform_latest}
 framework = ${common.framework}
 board = ${common.board_4m}
 board_build.flash_mode = ${common.flash_mode}