Bump to syntect 5.0.0 to e.g. start lazy-loading syntaxes (#2181)

* Bump to syntect 5.0.0 to e.g. start lazy-loading themes

Closes #915
Closes #951
Closes #1846
Closes #1854

* Typo fix formated -> formatted

* Update CHANGELOG.md

Cargo.lock

@@ -580,12 +580,6 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
-[[package]]
-name = "lazycell"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
-
 [[package]]
 name = "libc"
 version = "0.2.125"
@@ -1071,9 +1065,9 @@ dependencies = [
 
 [[package]]
 name = "syntect"
-version = "4.6.0"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b20815bbe80ee0be06e6957450a841185fcf690fe0178f14d77a05ce2caa031"
+checksum = "c6c454c27d9d7d9a84c7803aaa3c50cd088d2906fe3c6e42da3209aa623576a8"
 dependencies = [
  "bincode",
  "bitflags",
@@ -1081,13 +1075,14 @@ dependencies = [
  "flate2",
  "fnv",
  "lazy_static",
- "lazycell",
+ "once_cell",
  "onig",
  "plist",
  "regex-syntax",
  "serde",
  "serde_derive",
  "serde_json",
+ "thiserror",
  "walkdir",
  "yaml-rust",
 ]