Use larger hole size to lower board production cost

The current PCB board design/gerbers have a minimum hole drill size of 0.2mm. If this can be enlarged to 0.3mm, it significantly drops the cost of production for these boards.

E.g. PCBWay will charge $65 for 10 boards at the current drill hole size (0.2mm). Changing to 0.3mm lowers the cost to $5 for 10 boards (93% reduction in cost).

There shouldn't be any significant impact to the design by enlarging the smallest drill points to 0.3mm