v0.3.0-beta1

• added integer test functions: CheckIntegerEqual(), CheckIntegerNotEqual(), CheckIntegerLess(), CheckIntegerLessOrEqual(), CheckIntegerGreater(), CheckIntegerGreaterOrEqual();
• added integer helper types: SignedInteger, UnsignedInteger, Integer (and ...Convertible variants);
• added IsFalse() and IsTrue() test functions;
• updated dependency ver2go to v0.1.3;
• removed testify/require dependency (tests now use STEGoL checks);
• documentation updates;
• minor layout changes;