fix(clippy1): Set clippy::float_cmp lint to deny (#907)

src/exercise.rs

@@ -154,7 +154,7 @@ path = "{}.rs""#,
                 Command::new("cargo")
                     .args(&["clippy", "--manifest-path", CLIPPY_CARGO_TOML_PATH])
                     .args(RUSTC_COLOR_ARGS)
-                    .args(&["--", "-D", "warnings"])
+                    .args(&["--", "-D", "warnings","-D","clippy::float_cmp"])
                     .output()
             }
         }