Bump cfg-expr from 0.15.2 to 0.15.4 (#14808)

Bumps [cfg-expr](https://github.com/EmbarkStudios/cfg-expr) from 0.15.2 to 0.15.4.
- [Release notes](https://github.com/EmbarkStudios/cfg-expr/releases)
- [Changelog](https://github.com/EmbarkStudios/cfg-expr/blob/main/CHANGELOG.md)
- [Commits](https://github.com/EmbarkStudios/cfg-expr/compare/0.15.2...0.15.4)

---
updated-dependencies:
- dependency-name: cfg-expr
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

substrate/Cargo.lock

@@ -1189,9 +1189,9 @@ dependencies = [
 
 [[package]]
 name = "cfg-expr"
-version = "0.15.2"
+version = "0.15.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e70d3ad08698a0568b0562f22710fe6bfc1f4a61a367c77d0398c562eadd453a"
+checksum = "b40ccee03b5175c18cde8f37e7d2a33bcef6f8ec8f7cc0d81090d1bb380949c9"
 dependencies = [
  "smallvec",
 ]

substrate/frame/support/procedural/Cargo.toml

@@ -17,7 +17,7 @@ proc-macro = true
 [dependencies]
 derive-syn-parse = "0.1.5"
 Inflector = "0.11.4"
-cfg-expr = "0.15.1"
+cfg-expr = "0.15.4"
 itertools = "0.10.3"
 proc-macro2 = "1.0.56"
 quote = "1.0.28"