Build errors with typst v0.12

[luv2code]

I have typst installed via snap which keeps it everygreen. I have some formatting changes, and so I wanted to catch my branch up and update my copy of the book - but the build failed.

My workaround is to downgrade typst to v0.11.

here is the build output with typst v0.12:

just build-pdf
typst compile --font-path fonts HypermediaSystems.typ
warning: unknown font family: yrsa
  ┌─ -1-copy-ack.typ:1:41
  │
1 │ #show heading: set text(size: 1em, font: "Yrsa")
  │                                          ^^^^^^

warning: `locate` with callback function is deprecated
  ┌─ lib/indexing.typ:3:24
  │
3 │   #let index(..content) = locate(loc =>
  │ ╭─────────────────────────^
4 │ │ [#metadata((content: content.pos(), location: loc))<jkrb_index>])
  │ ╰─────────────────────────────────────────────────────────────────^
  │
  = hint: use a `context` expression instead

warning: Typst's default font has changed from Linux Libertine to its successor Libertinus Serif
   ┌─ lib/style.typ:52:18
   │
52 │   #set text(font: body-font, size: 12pt, lang: "en")
   │                   ^^^^^^^^^
   │
   = hint: please set the font to `"Libertinus Serif"` instead
   = hint: Linux Libertine is available on your system - you can ignore this warning if you are sure you want to use it
   = hint: this warning will be removed in Typst 0.13

warning: unknown font family: berkeley mono
   ┌─ lib/style.typ:54:28
   │
54 │   #show raw: set text(font: mono-font)
   │                             ^^^^^^^^^

warning: `show par: set block(spacing: ..)` has no effect anymore
   ┌─ lib/style.typ:66:3
   │
66 │   #show par: set block(spacing: leading)
   │    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   │
   = hint: write `set par(spacing: ..)` instead
   = hint: this is specific to paragraphs as they are not considered blocks anymore

warning: `locate` with callback function is deprecated
   ┌─ lib/indexing.typ:23:2
   │
23 │ ╭   locate(
24 │ │     loc => {
25 │ │       let index-terms = query(<jkrb_index>, loc)
26 │ │       let terms-dict = (:)
   · │
86 │ │     },
87 │ │   )
   │ ╰───^
   │
   = hint: use a `context` expression instead

warning: `locate` with callback function is deprecated
    ┌─ lib/style.typ:190:7
    │
190 │         #locate(loc => counter(heading).update((..args) =>
    │ ╭────────^
191 │ │         (args.pos().at(0), chapter-counter.at(loc).last())))
    │ ╰────────────────────────────────────────────────────────────^
    │
    = hint: use a `context` expression instead

warning: calling `query` with a location is deprecated
   ┌─ lib/indexing.typ:25:24
   │
25 │       let index-terms = query(<jkrb_index>, loc)
   │                         ^^^^^^^^^^^^^^^^^^^^^^^^
   │
   = hint: try removing the location argument