wtg: overly broad matches on non-drill/non-gerber files

[kasbah]

I think due to these really broad matches non-drill files will with fab npth or drill in the filename will get matched as drill.

tracespace/packages/whats-that-gerber/lib/layer-types.js

Lines 206 to 208 in 4dd28df

	{match: /fab/, cad: c._CAD_GEDA_PCB},
	{match: /npth/, cad: c._CAD_KICAD},
	{match: '/drill/', cad: c._CAD_EAGLE_PCBNG},

Noticed it because I'm getting these matches:

    'hardware/teensy-fx-2020-01-12-fab.zip': { type: 'drill', side: 'all' }
    'hardware/teensy-fx-2020-02-10-fab.zip': { type: 'drill', side: 'all' }

[kasbah]

Also seeing these:

    'drawings.pretty/ruler_panel_bottom.kicad_mod': { type: 'copper', side: 'bottom' },
    'drawings.pretty/ruler_panel_top.kicad_mod': { type: 'copper', side: 'top' },
    'drawings/ruler_panel_bottom.svg': { type: 'copper', side: 'bottom' },
    'drawings/ruler_panel_top.svg': { type: 'copper', side: 'top' },

[kasbah]

Another example: https://github.com/tracespace/tracespace/files/6509991/STM_2020_30_12.zip