Add CODEOWNERS file

.github/CODEOWNERS

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..4c0f233
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,3 @@
+# Require approval for new changes to check maintain backwards
+# compatibility and consistency.
+* @ernesto-jimenez