The authors of the dependency Rust crates:

aho-corasick (version 0.7.20):
  Andrew Gallant

autocfg (version 1.1.0):
  Josh Stone

base64 (version 0.13.1):
  Alice Maz
  Marshall Pierce

bitflags (version 1.3.2):
  The Rust Project Developers

cc (version 1.0.79):
  Alex Crichton

cfg-if (version 1.0.0):
  Alex Crichton

console (version 0.15.7):
  Armin Ronacher

crossbeam-channel (version 0.5.8):
  

crossbeam-deque (version 0.8.3):
  

crossbeam-epoch (version 0.9.14):
  

crossbeam-utils (version 0.8.15):
  

darling_core (version 0.14.4):
  Ted Driggs

darling_macro (version 0.14.4):
  Ted Driggs

darling (version 0.14.4):
  Ted Driggs

derive_builder_core (version 0.12.0):
  Colin Kiegel
  Pascal Hertleif
  Jan-Erik Rediger
  Ted Driggs

derive_builder_macro (version 0.12.0):
  Colin Kiegel
  Pascal Hertleif
  Jan-Erik Rediger
  Ted Driggs

derive_builder (version 0.12.0):
  Colin Kiegel
  Pascal Hertleif
  Jan-Erik Rediger
  Ted Driggs

either (version 1.8.1):
  bluss

encode_unicode (version 0.3.6):
  Torbjørn Birch Moltu

esaxx-rs (version 0.1.8):
  Nicolas Patry

extendr-api (version 0.4.0):
  andy-thomason
  Thomas Down
  Mossa Merhi Reimert
  Claus O. Wilke
  Hiroaki Yutani
  Ilia A. Kosenkov
  Michael Milton

extendr-engine (version 0.4.0):
  andy-thomason
  Thomas Down
  Mossa Merhi Reimert
  Claus O. Wilke
  Hiroaki Yutani
  Ilia A. Kosenkov

extendr-macros (version 0.4.0):
  andy-thomason
  Thomas Down
  Mossa Merhi Reimert
  Claus O. Wilke
  Hiroaki Yutani
  Ilia A. Kosenkov

fnv (version 1.0.7):
  Alex Crichton

getrandom (version 0.2.9):
  The Rand Project Developers

hermit-abi (version 0.2.6):
  Stefan Lankes

ident_case (version 1.0.1):
  Ted Driggs

indicatif (version 0.15.0):
  Armin Ronacher

itertools (version 0.8.2):
  bluss

itertools (version 0.9.0):
  bluss

itoa (version 1.0.6):
  David Tolnay

lazy_static (version 1.4.0):
  Marvin Löbel

libc (version 0.2.142):
  The Rust Project Developers

libR-sys (version 0.4.0):
  andy-thomason
  Thomas Down
  Mossa Merhi Reimert
  Claus O. Wilke
  Ilia A. Kosenkov
  Hiroaki Yutani

log (version 0.4.17):
  The Rust Project Developers

macro_rules_attribute-proc_macro (version 0.1.3):
  Daniel Henry-Mantilla

macro_rules_attribute (version 0.1.3):
  Daniel Henry-Mantilla

memchr (version 2.5.0):
  Andrew Gallant
  bluss

memoffset (version 0.8.0):
  Gilad Naaman

minimal-lexical (version 0.2.1):
  Alex Huszagh

monostate-impl (version 0.1.6):
  David Tolnay

monostate (version 0.1.6):
  David Tolnay

nom (version 7.1.3):
  contact@geoffroycouprie.com

num_cpus (version 1.15.0):
  Sean McArthur

number_prefix (version 0.3.0):
  Benjamin Sago

once_cell (version 1.18.0):
  Aleksey Kladov

onig_sys (version 69.8.1):
  Will Speak
  Ivan Ivashchenko

onig (version 6.4.0):
  Will Speak
  Ivan Ivashchenko

paste (version 1.0.12):
  David Tolnay

pkg-config (version 0.3.27):
  Alex Crichton

ppv-lite86 (version 0.2.17):
  The CryptoCorrosion Contributors

proc-macro2 (version 1.0.56):
  David Tolnay
  Alex Crichton

quote (version 1.0.26):
  David Tolnay

rand_chacha (version 0.3.1):
  The Rand Project Developers
  The Rust Project Developers
  The CryptoCorrosion Contributors

rand_core (version 0.6.4):
  The Rand Project Developers
  The Rust Project Developers

rand (version 0.8.5):
  The Rand Project Developers
  The Rust Project Developers

rayon-cond (version 0.1.0):
  Josh Stone

rayon-core (version 1.11.0):
  Niko Matsakis
  Josh Stone

rayon (version 1.7.0):
  Niko Matsakis
  Josh Stone

regex-syntax (version 0.6.29):
  The Rust Project Developers

regex (version 1.7.3):
  The Rust Project Developers

ryu (version 1.0.13):
  David Tolnay

scopeguard (version 1.1.0):
  bluss

serde_derive (version 1.0.160):
  Erick Tryzelaar
  David Tolnay

serde_json (version 1.0.96):
  Erick Tryzelaar
  David Tolnay

serde (version 1.0.160):
  Erick Tryzelaar
  David Tolnay

smallvec (version 1.10.0):
  The Servo Project Developers

spm_precompiled (version 0.1.4):
  Nicolas Patry

strsim (version 0.10.0):
  Danny Guo

syn (version 1.0.109):
  David Tolnay

syn (version 2.0.15):
  David Tolnay

thiserror-impl (version 1.0.40):
  David Tolnay

thiserror (version 1.0.40):
  David Tolnay

tokenizers (version 0.13.3):
  Anthony MOI
  Nicolas Patry

unicode_categories (version 0.1.1):
  Sean Gillespie

unicode-ident (version 1.0.8):
  David Tolnay

unicode-normalization-alignments (version 0.1.12):
  Anthony MOI

unicode-segmentation (version 1.10.1):
  kwantam
  Manish Goregaokar

unicode-width (version 0.1.10):
  kwantam
  Manish Goregaokar

wasi (version 0.11.0+wasi-snapshot-preview1):
  The Cranelift Project Developers

windows_aarch64_gnullvm (version 0.42.2):
  Microsoft

windows_aarch64_msvc (version 0.42.2):
  Microsoft

windows_i686_gnu (version 0.42.2):
  Microsoft

windows_i686_msvc (version 0.42.2):
  Microsoft

windows_x86_64_gnu (version 0.42.2):
  Microsoft

windows_x86_64_gnullvm (version 0.42.2):
  Microsoft

windows_x86_64_msvc (version 0.42.2):
  Microsoft

windows-sys (version 0.45.0):
  Microsoft

windows-targets (version 0.42.2):
  Microsoft