Encoding issues in IntelliJ

[SquidXTV]

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Fix encoding issues:

[...]\features\basic\SuggestionsUpDownVoter.java:27: error: unmappable character (0x8D) for encoding windows-1252
    private static final Emoji FALLBACK_UP_VOTE = Emoji.fromUnicode("�?");

Add to build.gradle:

    compileJava {
        options.encoding = "UTF-8"
    }

    compileTestJava {
        options.encoding = "UTF-8"
    }