The ParsePatch function doesn't parse rename changes

[juansesierra]

if you try to parse something like:

diff --git a/README.md b/README-2.md
similarity index 100%
rename from README.md
rename to README-2.md

the function parsePatch doesn't return an object with the expected value:

{
    oldFileName: "README.md"
    newFileName: "README-2.md"
    hunks: []
}