chore: breaking_changes.md; increment version

breaking_changes.md

@@ -1,10 +1,6 @@
 # Breaking changes
-### Upgrading from v2.5.1 to v3.0.0-alpha
-This is an informal list of changes, maintained during development, to give a "heads up" on what to expect.
+### Upgrading from v2.5.1 to v3.0.0
 
-The list will grow and change.
-
-### Just tell me already!
 
  * `update()` is gone
     * update happens automatically after paging
@@ -18,4 +14,8 @@ The list will grow and change.
         * `setFastmode(instance.fastmode.OFF)` - > `fastmodeOff()`
         * `setFastmode(instance.fastmode.FINALIZING)` - > `fastmodeON()`
         * `setFastmode(instance.fastmode.ON)` - > `fastmodeTurbo()`
-        </nobr>
+        </nobr>
+* `deepSleep()` replaced with new  hardware-focussed methods:
+    * `usingPowerSwitching(pin, switch_type)`
+    * `externalPowerOff()`
+    * `externalPowerOn()`

docs/README.md

@@ -3,6 +3,8 @@
 Third-party Arduino Library for **Heltec E-Ink Module** displays.<br />
 Run-time drawing, using Adafruit-GFX.
 
+*v2.x users: see [breaking_changes.md](breaking_changes.md)*
+
 **[Read the API](/docs/API.md)** <br />
 
 - [Supported Platforms](#supported-platforms)

library.properties

@@ -1,9 +1,9 @@
 name=heltec-eink-modules
-version=3.0.0-alpha
+version=3.0.0
 author=Todd Herbert
 maintainer=Todd Herbert
 sentence=Third party graphics library for Heltec E-Ink modules. 
-paragraph=AdafruitGFX and paging, to enable Arduino UNO support. 
+paragraph=AdafruitGFX and Arduino Uno R3 support. 
 category=Display
 url=https://github.com/todd-herbert/heltec-eink-modules
-architectures=avr, esp32
+architectures=avr, esp32, esp8266