1.0.0-alpha.5

• Added computed property names support in object literals
• Added pick() method
• Added array-like notation to access properties, e.g. foo["bar"]. It works like in JS for everything with exception for arrays, where it equivalents to array.map(e => e[key]). Use pick() method to get an element by index in array
• Added syntax to define a block scoped constant, e.g. .($foo:$.some.path.to.cache(); bar=$foo or baz=$foo)
• Changed single quoted string meaning to treat it as a string (used before for a property access with prohibited characters in name)
• Changed array literals to use brackets instead of parentheses
• Fixed scope issue for method arguments, a scope the same as for query root (#1)