feat: Add support for MCP23016 IO Expander (#1012)

* feat: Add support for MCP23016 IO extander

* fix: Fix style

tests/test1.yaml

@@ -867,6 +867,13 @@ binary_sensor:
       number: 7
       mode: INPUT_PULLUP
       inverted: False
+  - platform: gpio
+    name: "MCP23 binary sensor"
+    pin:
+      mcp23016: mcp23016_hub
+      number: 7
+      mode: INPUT
+      inverted: False
 
   - platform: remote_receiver
     name: "Raw Remote Receiver Test"
@@ -990,6 +997,13 @@ output:
       number: 0
       mode: OUTPUT
       inverted: False
+  - platform: gpio
+    id: id25
+    pin:
+      mcp23016: mcp23016_hub
+      number: 0
+      mode: OUTPUT
+      inverted: False
   - platform: my9231
     id: my_0
     channel: 0
@@ -1569,6 +1583,10 @@ mcp23008:
   - id: 'mcp23008_hub'
     address: 0x22
 
+mcp23016:
+  - id: 'mcp23016_hub'
+    address: 0x23
+
 stepper:
 - platform: a4988
   id: my_stepper