*/*: update for slotted Rust

guru version of this commit:
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=01ba4dc61965ef7658a24728841c04c9a1ce4871

Closes: https://bugs.gentoo.org/943170
Closes: https://bugs.gentoo.org/943223
Closes: #260
Signed-off-by: Takuya Wakazono <pastalian46@gmail.com>

app-misc/onefetch/onefetch-2.21.0-r1.ebuild

@@ -465,6 +465,8 @@ CRATES="
 	zune-inflate@0.2.54
 "
 
+RUST_MIN_VER="1.74.0"
+
 inherit cargo shell-completion
 
 DESCRIPTION="Command-line Git information tool"
@@ -486,7 +488,6 @@ DEPEND="${RDEPEND}"
 BDEPEND="
 	dev-build/cmake
 	virtual/pkgconfig
-	>=virtual/rust-1.74.0
 	test? (
 		app-arch/xz-utils
 		dev-vcs/git
@@ -498,6 +499,7 @@ QA_FLAGS_IGNORED="usr/bin/onefetch"
 
 pkg_setup() {
 	export ZSTD_SYS_USE_PKG_CONFIG=1
+	rust_pkg_setup
 }
 
 src_install() {