Add test for issue-4543

Author: sasurau4

tests/source/issue-4543.rs

@@ -0,0 +1,4 @@
+fn main() {
+    let oid = oid!(1.2.840.113549.1.1.5);
+    let oid2 = oid!(2.5.4.3);
+}

tests/target/issue-4543.rs

@@ -0,0 +1,4 @@
+fn main() {
+    let oid = oid!(1.2.840.113549.1.1.5);
+    let oid2 = oid!(2.5.4.3);
+}