Resolve semicolon_if_nothing_returned pedantic clippy lint from PR 1127

    warning: consider adding a `;` to the last statement for consistent formatting
       --> src/map.rs:377:9
        |
    377 |         self.map.hash(state)
        |         ^^^^^^^^^^^^^^^^^^^^ help: add a `;` here: `self.map.hash(state);`
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned
        = note: `-W clippy::semicolon-if-nothing-returned` implied by `-W clippy::pedantic`
        = help: to override `-W clippy::pedantic` add `#[allow(clippy::semicolon_if_nothing_returned)]`

src/map.rs

@@ -374,7 +374,7 @@ impl Eq for Map<String, Value> {}
 impl Hash for Map<String, Value> {
     #[inline]
     fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
-        self.map.hash(state)
+        self.map.hash(state);
     }
 }
 #[cfg(feature = "preserve_order")]