added withUrlEncode function

[edwardteach42]

Added new option:
withUrlEncode(true);

This allows you to enable the php urlencod() on the cookie name and value if needed. This was necessary as most of my cookies are base64 encoded for AWS CloudFront and the equals symbol.

[ajgarlag]

Your PR is a BC break and the tests are broken. To avoid it, the urlEncode property should be true by default. You should add some tests for your added feature.

Anyway there are at least three points where you should skip the urlencode and urldecode calls:

dflydev-fig-cookies/src/Dflydev/FigCookies/SetCookie.php

Lines 159 to 161 in ecd9e50

	$cookieStringParts = [
	urlencode($this->name).'='.urlencode($this->value),
	];

dflydev-fig-cookies/src/Dflydev/FigCookies/Cookie.php

Lines 61 to 64 in ecd9e50

	public function __toString()
	{
	return urlencode($this->name).'='.urlencode($this->value);
	}

dflydev-fig-cookies/src/Dflydev/FigCookies/StringUtil.php

Lines 20 to 22 in fc5a026

	return array_map(function ($part) {
	return urldecode($part);
	}, $pairParts);