Prepare mbed-tools release 7.28.0

Author: monty-bot

CHANGELOG.md

@@ -12,6 +12,15 @@ beta releases are not included in this history. For a full list of all releases,
 
 [//]: # (begin_release_notes)
 
+7.28.0 (2021-07-02)
+===================
+
+Features
+--------
+
+- Targets modified: DISCO-L562QE (STM32L562E-DK). (#20210702050108)
+
+
 7.27.0 (2021-06-26)
 ===================
 

src/mbed_tools/targets/_internal/data/board_database_snapshot.json

@@ -1204,9 +1204,12 @@
  "slug": "ST-Discovery-L562QE",
  "build_variant": [],
  "mbed_os_support": [
- "Mbed OS 6.0",
- "Mbed OS 6.1",
- "Mbed OS 6.2"
+ "Mbed OS 6.10",
+ "Mbed OS 6.11",
+ "Mbed OS 6.12",
+ "Mbed OS 6.7",
+ "Mbed OS 6.8",
+ "Mbed OS 6.9"
  ],
  "mbed_enabled": []
  },