chore: Fix deprecation warnings

Author: theduke

src/format.rs

@@ -93,7 +93,7 @@ impl<'a> Formatter<'a> {
         for c in s.chars() {
             match c {
                 '\n' => has_newline = true,
-                '\r' | '\t' | '\u{0020}'...'\u{FFFF}' => {}
+                '\r' | '\t' | '\u{0020}'..='\u{FFFF}' => {}
                 _ => has_nonprintable = true,
             }
         }
@@ -107,7 +107,7 @@ impl<'a> Formatter<'a> {
                     '\t' => self.write(r"\t"),
                     '"' => self.write("\\\""),
                     '\\' => self.write(r"\\"),
-                    '\u{0020}'...'\u{FFFF}' => self.buf.push(c),
+                    '\u{0020}'..='\u{FFFF}' => self.buf.push(c),
                     _ => write!(&mut self.buf, "\\u{:04}", c as u32).unwrap(),
                 }
             }

src/tokenizer.rs

@@ -169,10 +169,10 @@ impl<'a> TokenStream<'a> {
                     )
                 }
             }
-            '_' | 'a'...'z' | 'A'...'Z' => {
+            '_' | 'a'..='z' | 'A'..='Z' => {
                 while let Some((idx, cur_char)) = iter.next() {
                     match cur_char {
-                        '_' | 'a'...'z' | 'A'...'Z' | '0'...'9' => continue,
+                        '_' | 'a'..='z' | 'A'..='Z' | '0'..='9' => continue,
                         _ => {
                             self.position.column += idx;
                             self.off += idx;
@@ -186,7 +186,7 @@ impl<'a> TokenStream<'a> {
 
                 Ok((Name, len))
             }
-            '-' | '0'...'9' => {
+            '-' | '0'..='9' => {
                 let mut exponent = None;
                 let mut real = None;
                 let len = loop {