Update radix-heap version

This avoids us depending on an old version of ordered_float, which has
a security advisory: https://rustsec.org/advisories/RUSTSEC-2020-0082

It also slightly reduces the number of dependencies of difftastic.

Cargo.lock

@@ -214,12 +214,6 @@ dependencies = [
  "quick-error",
 ]
 
-[[package]]
-name = "ieee754"
-version = "0.2.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9007da9cacbd3e6343da136e98b0d2df013f553d35bdec8b518f07bea768e19c"
-
 [[package]]
 name = "itertools"
 version = "0.10.1"
@@ -283,24 +277,6 @@ dependencies = [
  "libmimalloc-sys",
 ]
 
-[[package]]
-name = "num-traits"
-version = "0.1.43"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
-dependencies = [
- "num-traits 0.2.14",
-]
-
-[[package]]
-name = "num-traits"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "num_cpus"
 version = "1.13.0"
@@ -311,25 +287,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "ordered-float"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7eb5259643245d3f292c7a146b2df53bba24d7eab159410e648eb73dc164669d"
-dependencies = [
- "num-traits 0.1.43",
- "unreachable",
-]
-
-[[package]]
-name = "ordered-float"
-version = "1.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3305af35278dd29f46fcdd139e0b1fbfae2153f0e5928b39b035542dd31e37b7"
-dependencies = [
- "num-traits 0.2.14",
-]
-
 [[package]]
 name = "output_vt100"
 version = "0.1.2"
@@ -387,14 +344,9 @@ dependencies = [
 
 [[package]]
 name = "radix-heap"
-version = "0.3.8"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e48d37c34f4ea428bfd19095e2f93fe5319f31f28651b806b1370e727cc552cf"
-dependencies = [
- "ieee754",
- "ordered-float 0.5.2",
- "ordered-float 1.1.1",
-]
+checksum = "e78ee6b9c4989e8331a007608b0e770c99ac5abda4038076cefb6849f8c05ec4"
 
 [[package]]
 name = "rayon"
@@ -538,27 +490,12 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
 
-[[package]]
-name = "unreachable"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
-dependencies = [
- "void",
-]
-
 [[package]]
 name = "vec_map"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
-[[package]]
-name = "void"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-
 [[package]]
 name = "walkdir"
 version = "2.3.2"

Cargo.toml

@@ -36,7 +36,7 @@ libc = "0.2.102"
 log = "0.4.14"
 pretty_env_logger = "0.4.0"
 mimalloc = { version = "0.1.26", default-features = false }
-radix-heap = "0.3.8"
+radix-heap = "0.4.0"
 walkdir = "2.3.2"
 
 [dev-dependencies]