Add changelog

docs/changelog.md

@@ -1,12 +1,18 @@
-2021-12-22
+2023-04-16 (cumulative)
+	- Add `dlg_assert_or` macro that will execute code in case the 
+	  assertion fails.
+	  Note that this will even happen when dlg is disabled, so suited
+	  for early-outs and defensive coding.
+	- Add `DLG_FAILED_ASSERTION_TEXT(x)`, a wrapper around the failed
+	  expression of an assert. Only ever called when the assertion
+	  has failed, so can be used to add additional handling (e.g.
+	  throwing) in that case for certain build configs. Found to be
+	  useful for static analysis, to silence warnings asserted upon.
 	- Rework how DLG_DISABLE works for api non-macro functions.
 	  The functions are now independent from DLG_DISABLE to prevent
 	  linking issues when DLG_DISABLE is defined
 
-2020-11-02
-	- Move documentation from disabled functions to actual implementations,
-	  may be more useful
-	- Add (improved) dlg_assert_or utility macros
+=== Release of v0.3 ===
 
 2019-12-07
 	- Add dlg_get_handler to allow handler chaining for debugging