Update dependency org.springframework:spring-core to v5.3.39 #366

All 144 177 tests pass in 1m 33s

144 177 tests ±0 144 177 ✔️ ±0 1m 33s ⏱️ -27s
        24 suites ±0           0 💤 ±0
        24 files ±0           0 ❌ ±0

Results for commit 7c397d1. ± Comparison against earlier commit eb64bf2.