Add check for unstable spring parameters

src/spring.luau

@@ -161,6 +161,11 @@ local function spring<T>(source: () -> T, period: number?, damping_ratio: number
     local c_c = 2*w_n
     local c = z * c_c
 
+    -- todo: is there a solution to this other than upping step frequency?
+    if c > UPDATE_RATE*2 then -- solver will explode if this is true
+        throw("spring damping too high, consider reducing damping or increasing period")
+    end
+
     local data: SpringData<T> = {
         k = k,
         c = c,