Update dependencies and do necessary migrations

src/transducer/mod.rs

@@ -1,3 +1,4 @@
 mod part;
 
-pub use part::*;
+#[allow(unused_imports)]
+pub use part::*;

src/transducer/part/thermocouple/type_k.rs

@@ -1,6 +1,6 @@
 //! Note - Thermocouple conversion uses [f64] arithmetic internally.
 
-use libm::pow;
+use libm::exp;
 use crate::error::InvalidValue;
 use crate::quantity::{Celsius, MilliVolts, Quantity};
 
@@ -45,7 +45,7 @@ fn _convert(
 
         Ok(Celsius(celsius as f32))
     } else if mv >= 20.644 && mv <= 54.886 {
-        let celsius = 1.318058e2
+        let celsius = -1.318058e2
             + 4.830222E+1 * mv
             + -1.646031 * mv_pow2
             + 5.464731E-2 * mv_pow3
@@ -136,8 +136,8 @@ pub fn temp_to_voltage_poly(
         Ok(MilliVolts(mv as f32))
     } else if celsius >= 0.0 && celsius <= 1372.0 {
         let base = celsius - 0.126968600000E+03;
-        let exp = -0.118343200000E-03 * (base * base);
-        let addition = pow(0.1185976, exp);
+        let exponent = -0.118343200000E-03 * (base * base);
+        let addition = 0.1185976 * exp(exponent);
 
         let mv = -0.176004136860E-01
             + 0.389212049750E-01 * celsius