10$: warn on unreachable code after infinite loop

[strager]

while (true) {
}
console.log("hi");  // warning: code after infinite loop cannot execute

for (;;) {
}
console.log("hi");  // warning: code after infinite loop cannot execute

for (; true;) {
}
console.log("hi");  // warning: code after infinite loop cannot execute

do {
} while (true);
console.log("hi");  // warning: code after infinite loop cannot execute