feat(cli): commit hash validation

Fixes conventional-changelog#3376

Author: Mersho

@commitlint/cli/src/cli.ts

@@ -200,6 +200,20 @@ async function main(args: MainArgs): Promise<void> {
 
 	const fromStdin = checkFromStdin(raw, flags);
 
+	if (
+		typeof flags.from !== 'undefined' &&
+		typeof flags.to !== 'undefined' &&
+		flags.from === flags.to
+	) {
+		const err = new CliError(
+			'Please use a different commit hash for --from and --to, not the same. (Or use the --last flag for analyzing just the last commit.)',
+			pkg.name
+		);
+		yargs.showHelp('log');
+		console.log(err.message);
+		throw err;
+	}
+
 	const input = await (fromStdin
 		? stdin()
 		: read({