Introduce new noFloatingPromises lint rule and fix violiations

client/space_lua/stdlib/os.ts

@@ -138,7 +138,7 @@ function dateTable(d: Date, utc: boolean): LuaTable {
   });
 
   if (!utc) {
-    tbl.rawSet("isdst", isDST(d));
+    void tbl.rawSet("isdst", isDST(d));
   }
 
   return tbl;

client/space_lua/stdlib/table.ts

@@ -399,7 +399,7 @@ export const tableApi = new LuaTable({
     for (let i = 0; i < n; i++) {
       await luaSet(tbl, i + 1, args[i], sf);
     }
-    tbl.rawSet("n", n);
+    void tbl.rawSet("n", n);
     return tbl;
   }),