Fix singular when unused variables is one

cli.js

@@ -44,15 +44,16 @@ const executeForPath = async(arg, options) => {
  const unusedVars = await fusv.findAsync(dir, options);
 
  console.log(`\nSearching for unused variables in "${picocolors.cyan(dir)}" folder, ${picocolors.cyan(options.fileExtensions.join(', '))} files...`);
- console.log(`${picocolors.cyan(unusedVars.total)} total variables.`);
+ console.log(`${picocolors.cyan(unusedVars.total)} total variable${unusedVars.total > 1 ? 's' : ''}.`);
 
- if (unusedVars.unused.length > 0) {
- console.log(`${picocolors.yellow(unusedVars.unused.length)} are not used!`);
+ const unusedVarsNumber = unusedVars.unused.length;
+ if (unusedVarsNumber > 0) {
+ console.log(`${picocolors.yellow(unusedVarsNumber)} ${unusedVarsNumber > 1 ? 'are' : 'is'} not used!`);
  for (const { name, file, line } of unusedVars.unused) {
  console.log(`Variable ${picocolors.red(name)} is not being used! ${picocolors.gray(file)}:${picocolors.yellow(line)}`);
  }
 
- throw new Error(`Found ${unusedVars.unused.length} unused variables in "${picocolors.cyan(dir)}" folder`);
+ throw new Error(`Found ${unusedVarsNumber} unused variable${unusedVarsNumber > 1 ? 's' : ''} in "${picocolors.cyan(dir)}" folder`);
  }
 
  console.log(picocolors.green(`No unused variables found in "${dir}!"`));