v4.0.0-0

• docs: Update changelog. 82dc242
• docs: Improve wording. efe4302
• new(string): Add lowerCase(), upperCase() checks. 51e1d90
• new(number): Add float(), int(), negative(), and positive() checks. 0283927
• breaking: Add type casting to checked values. 6100e10
• Run some tests in production. 719701c
• new: Add tuple predicate and builder. (#18) 79268d0
• breaking: Update Node requirement to v10. (#17) 01fdae3
• breaking: Remove public checker APIs that should not be accessible. (#16) e52a873
• new: Add factory function support to default values. 3367e6e
• new(array,object,string): Add new sizeOf check. 3221d93

v3.4.0...v4.0.0-0