Add more changes to 0.1.45

RELEASES.md

@@ -1,10 +1,15 @@
 # Release 0.1.45 (2022-04-29)
 
+- [`Integer::next_multiple_of` and `prev_multiple_of` no longer overflow -1][45].
 - [`Integer::is_multiple_of` now handles a 0 argument without panicking][47]
   for primitive integers.
+- [`ExtendedGcd` no longer has any private fields][46], making it possible for
+  external implementations to customize `Integer::extended_gcd`.
 
-**Contributors**: @cuviper, @WizardOfMenlo
+**Contributors**: @ciphergoth, @cuviper, @tspiteri, @WizardOfMenlo
 
+[45]: https://github.com/rust-num/num-integer/pull/45
+[46]: https://github.com/rust-num/num-integer/pull/46
 [47]: https://github.com/rust-num/num-integer/pull/47
 
 # Release 0.1.44 (2020-10-29)