deleting the macro MICRO_SECONDS_PRE_SEC broke builds

[gav2xlin]

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Describe the bug
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drogon 1.9.11
trantor 1.5.25 (it works with 1.5.23)

https://conan.io/center/recipes/drogon
https://conan.io/center/recipes/trantor

To Reproduce
Steps to reproduce the behavior:

I build the Conan package drogon and get this error

/home/gav2xlin/.conan2/p/b/drogo9f0dcc0bb5db8/b/src/lib/src/HttpResponseImpl.cc: In member function ‘std::shared_ptrtrantor::MsgBuffer drogon::HttpResponseImpl::renderToBuffer()’:
/home/gav2xlin/.conan2/p/b/drogo9f0dcc0bb5db8/b/src/lib/src/HttpResponseImpl.cc:657:54: error: ‘MICRO_SECONDS_PRE_SEC’ was not declared in this scope
657 | ((now.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC) !=
| ^~~~~~~~~~~~~~~~~~~~~
[101/148] Building CXX object CMakeFiles/drogon.dir/lib/src/IntranetIpFilter.cc.o

The version 1.9.11 requires this macro:
./lib/tests/unittests/HttpDateTest.cc: CHECK(date.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC == 1591348778);
./lib/tests/unittests/HttpDateTest.cc: CHECK(date.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC == 1591348778);
./lib/tests/unittests/HttpDateTest.cc: CHECK(date.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC == epoch);
./lib/src/Utilities.cc: auto nowSecond = date.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC;
./lib/src/Utilities.cc: auto nowSecond = date.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC;
./lib/src/Utilities.cc: auto nowSecond = date.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC;
./lib/src/Utilities.cc: return trantor::Date(epoch * MICRO_SECONDS_PRE_SEC);
./lib/src/HttpResponseImpl.cc: ((now.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC) !=
./lib/src/HttpResponseImpl.cc: now.microSecondsSinceEpoch() / MICRO_SECONDS_PRE_SEC;

But the macro was completely removed and even renamed

an-tao/trantor@v1.5.23...v1.5.25

MICRO_SECONDS_PRE_SEC -> MICRO_SECONDS_PER_SEC

MICRO_SECONDS_PRE_SEC is defined nowhere
./trantor/utils/Date.h:#define MICRO_SECONDS_PRE_SEC 1000000LL <- was deleted

Is is a system macro or what?

Expected behavior
A clear and concise description of what you expected to happen.

Build without errors. Please, release a newer version of Drogon compatible with Trantor

Additional context
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