Updated BREAKING.md

BREAKING.md

@@ -1,9 +1,19 @@
 Log of breaking changes in index or alr.
 
-### alr 2.0.0 + index 1.2.2
+### alr 3.0.0 + index 1.3.0
+
+- alr: removed `ALR_CONFIG` environment variable.
+- alr: removed `alr config` command.
+
+### alr 2.0.0 + index 1.3.0
+
+- index:`binary` property required in binary origins.
+- index: Paths in `[environment]` must be portable (using forward slashes).
+- alr: removed `alr toolchain`'s `--install, --uninstall, --install-dir`.
+- alr: deprecated (but still working) `ALR_CONFIG`, `alr config`.
 
 ### alr 1.2.2 + index 1.2.1
 
-- Unable to load externals containing regex special characters in the system
+- alr: unable to load externals containing regex special characters in the system
 package name (fixed in #1545).
-- Paths in `[environment]` are not converted to the native platform convention.
+- alr: paths in `[environment]` are not converted to the native platform convention.