Bump to version 54 / 1.42.

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="net.sourceforge.opencamera"

    android:versionCode="53"

    android:versionName="1.41.1"

    android:versionCode="54"

    android:versionName="1.42"

    android:installLocation="auto"

    >