Fix builds and tests.

src/ast.rs

@@ -1549,6 +1549,7 @@ impl<F: Float> FloatWrapper<F> {
     }
 }
 
+#[cfg(not(feature = "no_float"))]
 impl FloatWrapper<FLOAT> {
     #[inline(always)]
     pub(crate) const fn const_new(value: FLOAT) -> Self {

tests/optimizer.rs

@@ -48,6 +48,7 @@ fn test_optimizer_run() -> Result<(), Box<EvalAltResult>> {
     Ok(())
 }
 
+#[cfg(not(feature = "no_module"))]
 #[test]
 fn test_optimizer_parse() -> Result<(), Box<EvalAltResult>> {
     let mut engine = Engine::new();