Minor bugs fix

Goal: Minor bugs fix.

Patch:

• Removed unnecessary whitespace replacement on variable parsing,
• Protection against corrupted .env key=value pair,
• More test cases for .env parser,

Upgrade to v2.0.0

Goal: Upgrade to NodeJS 8.x and remove normalization for more flexibility.

Major:

• Require NodeJS>=8.9,
• Allow for lower case variable names (will not normalize to upper case),
• Trim keys and values from .env file on load,

Minor:

• Allow for spaces in variable keys (will be normalize to underscore),
• Allow for white spaces before and after equal character for example: ENV_KEY = env value,

v1.2.1

lastCallback module added to detect callback functioneslintrc rules u…