message: pushpin: pin ts-mixer version
diff: @@ -9,4 +9,4 @@ export type {
  } from 'https://deno.land/x/redis@v0.14.1/mod.ts'
  export { walk } from 'https://deno.land/std@0.86.0/fs/walk.ts'
  export { join } from 'https://deno.land/std@0.86.0/path/mod.ts'
  -export { Mixin } from 'https://esm.sh/ts-mixer'
  +export { Mixin } from 'https://esm.sh/ts-mixer@5.4.0'
  