Add crate to fully qualify path

During the MSRV bump we missed a few instances of `crate::` on fully
qualified paths. Builds still because `util` is in scope.

Add `crate::` to the front to _fully_ qualify fully qualified paths.

Author: tcharding

src/ripemd160.rs

@@ -79,7 +79,7 @@ impl crate::HashEngine for HashEngine {
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[repr(transparent)]
 pub struct Hash(
-    #[cfg_attr(feature = "schemars", schemars(schema_with = "util::json_hex_string::len_20"))]
+    #[cfg_attr(feature = "schemars", schemars(schema_with = "crate::util::json_hex_string::len_20"))]
     [u8; 20]
 );
 

src/sha1.rs

@@ -74,7 +74,7 @@ impl crate::HashEngine for HashEngine {
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[repr(transparent)]
 pub struct Hash(
-    #[cfg_attr(feature = "schemars", schemars(schema_with = "util::json_hex_string::len_20"))]
+    #[cfg_attr(feature = "schemars", schemars(schema_with = "crate::util::json_hex_string::len_20"))]
     [u8; 20]
 );
 

src/sha256.rs

@@ -74,7 +74,7 @@ impl crate::HashEngine for HashEngine {
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[repr(transparent)]
 pub struct Hash(
-    #[cfg_attr(feature = "schemars", schemars(schema_with = "util::json_hex_string::len_32"))]
+    #[cfg_attr(feature = "schemars", schemars(schema_with = "crate::util::json_hex_string::len_32"))]
     [u8; 32]
 );
 

src/sha512.rs

@@ -81,7 +81,7 @@ impl crate::HashEngine for HashEngine {
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[repr(transparent)]
 pub struct Hash(
-    #[cfg_attr(feature = "schemars", schemars(schema_with = "util::json_hex_string::len_64"))]
+    #[cfg_attr(feature = "schemars", schemars(schema_with = "crate::util::json_hex_string::len_64"))]
     [u8; 64]
 );
 

src/siphash24.rs

@@ -199,7 +199,7 @@ impl crate::HashEngine for HashEngine {
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[repr(transparent)]
 pub struct Hash(
-    #[cfg_attr(feature = "schemars", schemars(schema_with = "util::json_hex_string::len_8"))]
+    #[cfg_attr(feature = "schemars", schemars(schema_with = "crate::util::json_hex_string::len_8"))]
     [u8; 8]
 );