Edit docs to have a note about -d:nulidInsecureRandom.

README.md

@@ -2,6 +2,9 @@
 This is an implementation of the [ULID](https://github.com/ulid/spec)
 spec in Nim!
 
+## Compile Flags
+`-d:nulidInsecureRandom`: Uses `std/random` instead of `std/sysrand`.
+
 ## Usage
 ```nim
 let gen = NULIDGenerator()

nulid.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.2.4"
+version       = "0.2.5"
 author        = "Yu Vitaqua fer Chronos"
 description   = "An implementation of ULID!"
 license       = "CC0"

src/nulid.nim

@@ -18,6 +18,13 @@ when InsecureRandom:
 else:
   import std/sysrand
 
+##[
+Note: `--define:nulidInsecureRandom` can be passed to the compiler to make it
+so that `std/random` is used instead of `std/sysrand`.
+The JS backend and Nimscript use this by default (whether either work with NULID
+is untested).
+]##
+
 type
   NULID* = object
     ## An object representing a ULID.