Fix REPL prompt corruption

v2.2.1

Bump version to 2.2.1

Highlights anchor and bug fixes

If swift-mode:highlight-anchor is non-nil, the anchor point is highlighted when indenting a line. For example, when indenting the aaa token in the following example, the character “c” of the token class is highlighted because the aaa token is indented relative to the character.

class Foo {
    aaa
}

This feature is disabled by default because it is intended for debugging.

New indentation logic

New indentation logic.

Note flycheck is moved to https://github.com/swift-emacs/flycheck-swift.