Merge #2060

2060: chore(all) set rust edition to 2021 r=MarinPostma a=MarinPostma

set the rust edition for the project to 2021

this make the MSRV to v1.56

#2058


Co-authored-by: Marin Postma <postma.marin@protonmail.com>

Cargo.toml

@@ -5,5 +5,4 @@ members = [
     "meilisearch-lib",
     "meilisearch-auth",
 ]
-
-resolver = "2"
+edition = "2021"

meilisearch-lib/Cargo.toml

@@ -2,7 +2,6 @@
 name = "meilisearch-lib"
 version = "0.25.0"
 edition = "2018"
-resolver = "2"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html