LEWISTON, Maine — A branding and digital marketing company that aims to personalize the digital presence of clients expects high growth this year as it increases its revenue, employees and office space. Anchour expects to boost revenue by 50 percent in 2019 and add eight more people by next year to join the current 22 employees, said Stephen Gilbert, CEO and co-founder of the company, which is located on Lisbon Street in downtown. “We also need to expand our office, which is 2,000 square feet,” he said.