do not export internal ABIs

Author: ItsNickBarry

hardhat.config.ts

@@ -27,8 +27,8 @@ const config: HardhatUserConfig = {
     runOnCompile: true,
     clear: true,
     flat: true,
-    // do not export test ABIs, including those generated by hardhat-exposed
-    except: ['.*Test$', '[$].*'],
+    // do not export internal or test ABIs, including those generated by hardhat-exposed
+    except: ['_.*', '.*Test$', '[$].*'],
   },
 
   gasReporter: {