Feature/number object (#182)

* Feature(Number): Tests for the Test Driven Development!

refs #34

* Feature: Skeleton code for Number

refs #34

* Feature: Most of Number() is complete

Includes:
- make_number()
- call_number()
- Number().toExponential()
- Number().toFixed()
- Number().toLocaleString() (ish)
- Number().toString()
- Number().valueOf()
- create_constructor()
- init()

Missing:
- Number().toPrecision()

refs #34

* Feature(Number): test compatability with const -> var

I don't have all the context on _why_ but all of the tests for `Number` started failing.

Upon investigation it was becuase `const` stopped acting the way I expected.
Switching my test cases from using `const` to using `var` variable declarations
made everything work again.  I don't know enough about JS to know if this is a
bug or expected behavior.  Based on changes to other tests, it is know
behavior.

Refs #34

* Changelog: Number() object.

Includes some clippy fixes.

Fixes #34

.gitignore

@@ -3,8 +3,8 @@
 *.iml
 
 # Vim
-.*.swp
-.*.swo
+*.*.swp
+*.*.swo
 
 # Build
 target
@@ -16,4 +16,4 @@ yarn-error.log
 .vscode/settings.json
 
 # tests/js/test.js is used for testing changes locally
-test/js/test.js
+tests/js/test.js

CHANGELOG.md

@@ -46,6 +46,8 @@ Feature enhancements:
   Implement Array.prototype.fill() (@bojan88)
 - Array tests: Tests implemented for shift, unshift and reverse, pop and push (@muskuloes)
 - Demo page has been improved, new font plus change on input. Thanks @WofWca
+- [FEATURE #182](https://github.com/jasonwilliams/boa/pull/182):
+  Implement some Number prototype methods (incl tests) (@pop)
 
 Bug fixes:
 

src/lib/builtins/mod.rs

@@ -12,6 +12,8 @@ pub mod function;
 pub mod json;
 /// The global `Math` object
 pub mod math;
+/// The global `Number` object
+pub mod number;
 /// The global `Object` object
 pub mod object;
 /// The global 'RegExp' object