Upgrade to regalloc 0.0.29.

This upgrade pulls in several recent changes in regalloc that should
improve compile-time performance in the AArch64 and new x64 backends.

Cargo.lock

@@ -1715,9 +1715,9 @@ dependencies = [
 
 [[package]]
 name = "regalloc"
-version = "0.0.28"
+version = "0.0.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3598bed0895fe0f72a9e0b00ef9e3a3c8af978a8401b2f2046dec5927de6364a"
+checksum = "c178c51068338acd359c6e1ed356fcffe6b6cb3c162f68f70e251ca29bfe0eba"
 dependencies = [
  "log",
  "rustc-hash",

cranelift/codegen/Cargo.toml

@@ -28,7 +28,7 @@ byteorder = { version = "1.3.2", default-features = false }
 peepmatic = { path = "../peepmatic", optional = true, version = "0.66.0" }
 peepmatic-traits = { path = "../peepmatic/crates/traits", optional = true, version = "0.66.0" }
 peepmatic-runtime = { path = "../peepmatic/crates/runtime", optional = true, version = "0.66.0" }
-regalloc = "0.0.28"
+regalloc = "0.0.29"
 wast = { version = "22.0.0", optional = true }
 # It is a goal of the cranelift-codegen crate to have minimal external dependencies.
 # Please don't add any unless they are essential to the task of creating binary