build: guard against case of no releases

Author: Planeshifter

lib/node_modules/@stdlib/_tools/changelog/generate/lib/main.js

@@ -290,8 +290,12 @@ function generate( pkg, releaseType ) {
 		releaseType = recommendVersionBump( commits.unreleased );
 	}
 	if ( releaseType ) {
-		newestRelease = releases[ releases.length-1 ][ 0 ];
-		nextVersion = semver.inc( newestRelease, releaseType );
+		if ( releases.length > 0 ) {
+			newestRelease = releases[ releases.length-1 ][ 0 ];
+			nextVersion = semver.inc( newestRelease, releaseType );
+		} else {
+			nextVersion = semver.inc( '0.0.0', releaseType );
+		}
 		if ( isNull( nextVersion ) ) {
 			throw new TypeError( format( 'invalid argument. Unrecognized release type: `%s`.', releaseType ) );
 		}