Fixes empty script returning segmentation fault

tests/parser/ParserTests.cpp

@@ -5,6 +5,18 @@
 #include "../../src/Parser/Parser.hpp"
 using namespace Porygon::Parser;
 
+TEST_CASE( "Parse empty script", "[parser]" ) {
+    vector<const Token*> v {
+            new SimpleToken(TokenKind::EndOfFile,0,0),
+    };
+    Parser parser = Parser(v, nullptr);
+    auto parsedScript = parser.Parse();
+    for (auto t : v){
+        delete t;
+    }
+    delete parsedScript;
+}
+
 TEST_CASE( "Parse single true keyword", "[parser]" ) {
     vector<const Token*> v {new SimpleToken(TokenKind::TrueKeyword,0,0), new SimpleToken(TokenKind::EndOfFile,0,0)};
     Parser parser = Parser(v, nullptr);