Update to ricu 0.6.0

[prockenschaub]

This integrates the latest updates in ricu. As not all bugs fixed in YAIB have been integrated into the main ricu package, we unfortunately still rely on a monkeypatch in prockenschaub/ricu-package. We hope to integrate them with the main distribution soon.

Note that in order to obtain the exact published numbers, please use the following specification in the renv.lock file instead:

"ricu": {
      "Package": "ricu",
      "Version": "0.5.3",
      "Source": "GitHub",
      "RemoteType": "github",
      "RemoteHost": "api.github.com",
      "RemoteRepo": "ricu-package",
      "RemoteUsername": "prockenschaub",
      "RemoteRef": "monkeypatch",
      "RemoteSha": "70dd2e65c3598b6108355fd98fd740a8347840ea",
      "Requirements": [
        "R",
        "assertthat",
        "backports",
        "cli",
        "curl",
        "data.table",
        "fansi",
        "fst",
        "jsonlite",
        "methods",
        "openssl",
        "prt",
        "readr",
        "rlang",
        "stats",
        "tibble",
        "utils",
        "vctrs"
      ],
      "Hash": "2681cdea2f2f3446691071ea30f745b5"
    }