message: QuatExpMap: Use some ApproxQuat to hopefully fix tests.
  Wasn't needed on Buster, but might be needed on VS2019.
diff: @@ -174,7 +174,7 @@ TEST_CASE("UnitQuatInput") {
  const Quaterniond exp_ln_q = quat_exp_map(ln_q).exp();
  - REQUIRE(q == exp_ln_q);
  + REQUIRE(q == ApproxQuat(exp_ln_q));
  }
  }
  #ifdef HAVE_QUATLIB
  @@ -182,8 +182,7 @@ TEST_CASE("UnitQuatInput") {
  QuatArray quatlib_q = toQuatlib(q);
  q_log(quatlib_q.data(), quatlib_q.data());
  q_exp(quatlib_q.data(), quatlib_q.data());
  - REQUIRE(ApproxVec(q.coeffs()) ==
  - quatFromQuatlib(quatlib_q).coeffs());
  + REQUIRE(ApproxQuat(q) == quatFromQuatlib(quatlib_q));
  }
  #endif // HAVE_QUATLIB
  };
  