code: function createBumpVersion(inPath, type) {
      if (!inPath) {
          throw new Error('Input path(s) argument is required');
      }
  
      return function bumpVersion() {
          return gulp.src(inPath)
              .pipe(bump({ type }))
              .pipe(gulp.dest(file => file.base));
      };
  }
docs: Higher order function to create gulp function that bumps the version in the package.json.
  @param  {string} inPath Path to the project's package.json
  @return {function} Function that can be used as a gulp task