Add new version tag for changed config APIs

Author: staticfloat

README.md

@@ -54,6 +54,8 @@ You can always tell if your system is limited in this fashion by calling `lbt_ge
 
 ### Version History
 
+v3.0.0 - Added `active_forwards` field to `lbt_libinfo_t` and `exported_symbols` to `lbt_config_t`.
+
 v2.1.0 - Added threading getter/setter API, direct setting API and default function API.
 
 v2.0.0 - Added f2c autodetection for Accelerate, changed public API to `lbt_forward()` from `load_blas_funcs()`.