eslint: require function declarations where possible
eslint: require function declarations where possible

Instead of defining a local function as

  var func = function () { ... };

we now require a function declaration:

  function func() { ... };

This is the style already in use.

mgeisler/swift-browser,mindware/swift-browser,zerovm/swift-browser,mgeisler/swift-browser,mindware/swift-browser,zerovm/swift-browser