Fix regex and memchr dependencies for rust 1.60

Cargo.lock

@@ -261,6 +261,7 @@ dependencies = [
  "libmimalloc-sys",
  "line-numbers",
  "log",
+ "memchr",
  "mimalloc",
  "owo-colors",
  "predicates",
@@ -524,9 +525,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.6.4"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
 name = "memoffset"
@@ -768,13 +769,13 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.9.6"
+version = "1.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebee201405406dbf528b8b672104ae6d6d63e6d118cb10e4d51abbc7b58044ff"
+checksum = "12de2eff854e5fa4b1295edd650e227e9d8fb0c9e90b12e7f36d6a6811791a29"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-automata 0.3.9",
+ "regex-automata 0.3.7",
  "regex-syntax",
 ]
 
@@ -786,9 +787,9 @@ checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
 
 [[package]]
 name = "regex-automata"
-version = "0.3.9"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59b23e92ee4318893fa3fe3e6fb365258efbfe6ac6ab30f090cdcbb7aa37efa9"
+checksum = "49530408a136e16e5b486e883fbb6ba058e8e4e8ae6621a77b048b314336e629"
 dependencies = [
  "aho-corasick",
  "memchr",

Cargo.toml

@@ -32,7 +32,10 @@ pkg-fmt = "zip"
 
 [dependencies]
 # regex 1.10 requires rust 1.65.
-regex = "1.9.6"
+# regex 1.9.5 depends on memchr 2.6, which requires rust 1.61.
+regex = ">= 1.9, < 1.9.5"
+memchr = ">= 2, < 2.6"
+
 clap = { version = "3.1.8", features = ["cargo", "env", "wrap_help"] }
 itertools = "0.11.0"
 typed-arena = "2.0.2"