fix the min rust version

Cargo.lock

@@ -1,7 +1,5 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
-
 [[package]]
 name = "advapi32-sys"
 version = "0.2.0"
@@ -734,15 +732,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46dbcb333e86939721589d25a3557e180b52778cb33c7fdfe9e0158ff790d5ec"
 
-[[package]]
-name = "indoc"
-version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5a75aeaaef0ce18b58056d306c27b07436fbb34b8816c53094b76dd81803136"
-dependencies = [
- "unindent",
-]
-
 [[package]]
 name = "ioctl-sys"
 version = "0.5.2"
@@ -1484,9 +1473,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.70"
+version = "1.0.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9505f307c872bab8eb46f77ae357c8eba1fdacead58ee5a850116b1d7f82883"
+checksum = "ad184cc9470f9117b2ac6817bfe297307418819ba40552f9b3846f05c33d5373"
 dependencies = [
  "proc-macro2",
  "quote 1.0.9",
@@ -2082,7 +2071,6 @@ dependencies = [
  "chrono",
  "clap",
  "globset",
- "indoc",
  "lazy_static",
  "locale",
  "lscolors",