Update version information

Version_CN.txt

@@ -23,4 +23,5 @@
 2020-12-09：添加新程序2.9inch V2 e-Paper例程。
 2020-12-09：添加新程序5.83inch V2 e-Paper例程。
 2020-12-25：添加新程序4.01inch (F) e-Paper例程。
-2021-02-22：添加新程序2.7inch B V2 e-Paper例程。
+2021-02-22：添加新程序2.7inch B V2 e-Paper例程。
+2021-07-19: 1.54V2、2.13V3、2.9V2、7.5V2程序均采用外部波形，并提升了刷新速度

Version_EN.txt

@@ -22,4 +22,5 @@
 2020-12-09: Added new program 2.9inch V2 e-Paper routine.
 2020-12-09: Added new program 5.83inch V2 e-Paper routine.
 2020-12-25: Added new program 4.01inch (F) e-Paper routine.
-2021-02-22: Added new program 2.7inch B V2 e-Paper routine.
+2021-02-22: Added new program 2.7inch B V2 e-Paper routine.
+2021-07-19: 1.54v2, 2.13v3, 2.9v2, and 7.5v2 programs all use external waveforms and have improved refresh speed.