update minimum version of Adafruit-PlatformDetect

Needed since 8273fc6, otherwise you will get:

```
AttributeError: module 'adafruit_platformdetect.constants.chips' has no attribute 'DRA74X'
```

diff --git a/requirements.txt b/requirements.txt
index 4eaf385e8b12c988284ee346a31182b7afa7d4a9..4fec2e45effadbde3aa42f366475eb072b96cc0f 100755 (executable)
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Adafruit-PlatformDetect>=2.18.1
+Adafruit-PlatformDetect>=2.27.0
 Adafruit-PureIO>=1.1.7
 Jetson.GPIO; platform_machine=='aarch64'
 RPi.GPIO; platform_machine=='armv7l' or platform_machine=='armv6l'