Arugula Font: A few more glyphs

a minor update to Arugula, a military-style stencil sans-serif font, https://drj11.itch.io/arugula-font that adds new glyphs, ∵⁂∴ (BECAUSE, ASTERISM, THEREFORE); a new #DutchIJ glyph (and discretionary ligature); and, somewhat radically for this font, character alternates for 0 (/zero with backslash) and J (/J with flat hook).