A bill broadly banning the use of conversion therapy on minors won bipartisan support in a legislative committee Thursday. The amended bill from Rep. Ryan Fecteau, D-Biddeford, would bar most certified licensed professionals from using the controversial method of therapy on anyone in Maine younger than 18 and prohibit the use of MaineCare to pay for it. It earned unanimous support from Democrats on the Health Coverage, Insurance and Financial Services Committee and partial support from Republicans.