private Request buildRequest(HttpUrl url) {
        String creds = Credentials.basic(username, password);

        return new Request.Builder()
            .url(url)
            // Setting here or OkHttp will wait for a 403 before trying authorization via #setAuthorisation.
            .header("Authorization", creds)
            .get()
            .build();
    }
Enrich pre-2.1.0.Final release.

Adds the missing ApiDefinition field to older Apiman export files.

@author Marc Savy {@literal <marc@blackparrotlabs.io>}
migration-assistant/src/main/java/io/apiman/migration/fix_pre_21/EnrichPre21ExportCommand.java