Use contains combinator instead of manual range

Clippy emits:

  warning: manual `RangeInclusive::contains` implementation

As suggested, use `contains` combinator instead of manual range check.

src/blockdata/script.rs

@@ -524,7 +524,7 @@ impl Script {
         // special meaning. The value of the first push is called the "version byte". The following
         // byte vector pushed is called the "witness program".
         let script_len = self.0.len();
-        if script_len < 4 || script_len > 42 {
+        if !(4..=42).contains(&script_len) {
             return false
         }
         let ver_opcode = opcodes::All::from(self.0[0]); // Version 0 or PUSHNUM_1-PUSHNUM_16
@@ -876,7 +876,7 @@ impl Builder {
     /// dedicated opcodes to push some small integers.
     pub fn push_int(self, data: i64) -> Builder {
         // We can special-case -1, 1-16
-        if data == -1 || (data >= 1 && data <= 16) {
+        if data == -1 || (1..=16).contains(&data) {
             let opcode = opcodes::All::from(
                 (data - 1 + opcodes::OP_TRUE.into_u8() as i64) as u8
             );