Add camelcase rule, import Error type from JS and rename get_inner_color to inner. (#44)

* Add camelcase rule to .eslintrc.js

* Import Error type from JS, rename crate::wrappers::Color::get_inner_color to crate::wrappers::Color::inner

client/web/wasm/src/shims.rs

@@ -0,0 +1,10 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+extern "C" {
+	#[derive(Clone, Debug)]
+	pub type Error;
+
+	#[wasm_bindgen(constructor)]
+	pub fn new(msg: &str) -> Error;
+}