Adding serial.set(Rx|Tx)BufferSize (#1931)

* Fix for https://github.com/Microsoft/pxt-microbit/issues/1929

* bump pxt

* updated docs

* fix default values

* moving dialogs to react

* moving to react

* typo

* typo

docs/reference/serial.md

@@ -21,6 +21,8 @@ serial.redirect(SerialPin.P0, SerialPin.P0, BaudRate.BaudRate115200);
 serial.redirectToUSB();
 serial.writeBuffer(pins.createBuffer(0));
 serial.readBuffer(64);
+serial.setRxBufferSize(64);
+serial.setTxBufferSize(64);
 ```
 
 ## See Also
@@ -30,4 +32,6 @@ serial.readBuffer(64);
 [writeNumbers](/reference/serial/write-numbers), [readUntil](/reference/serial/read-until), [readLine](/reference/serial/read-line),
 [readString](/reference/serial/read-string), [onDataReceived](/reference/serial/on-data-received),
 [redirect](/reference/serial/redirect), [writeBuffer](/reference/serial/write-buffer), [readBuffer](/reference/serial/read-buffer),
-[redirectToUSB](/reference/serial/redirect-to-usb)
+[redirectToUSB](/reference/serial/redirect-to-usb),
+[set rx buffer size](/reference/serial/set-rx-buffer-size),
+[set tx buffer size](/reference/serial/set-tx-buffer-size)

docs/reference/serial/set-rx-buffer-size.md

@@ -0,0 +1,23 @@
+# set Rx Buffer Size
+
+Sets the length of the serial reception buffer in bytes.
+
+```sig
+serial.setRxBufferSize(10)
+```
+
+## Parameters
+
+* **size**: desired length of the reception buffer
+
+## Example
+
+Allocates 64 bytes for the reception buffer.
+
+```typescript
+serial.setRxBufferSize(64)
+```
+
+## See also
+
+[set tx buffer size](/reference/serial/set-tx-buffer-size)

docs/reference/serial/set-tx-buffer-size.md

@@ -0,0 +1,23 @@
+# set Tx Buffer Size
+
+Sets the length of the serial transmission buffer in bytes.
+
+```sig
+serial.setTxBufferSize(10)
+```
+
+## Parameters
+
+* **size**: desired length of the transmission buffer
+
+## Example
+
+Allocates 64 bytes for the transmission buffer.
+
+```typescript
+serial.setTxBufferSize(64)
+```
+
+## See also
+
+[set rx buffer size](/reference/serial/set-rx-buffer-size)