fix(nodejs): only call get_current_error when an error occurred #616

Job	Run time
Run checks (ubuntu-latest)	31s
Run checks (macos-latest)	1m 15s
Run checks (windows-latest)	1m 22s
Build library (linux-aarch64, ubuntu-latest, libaries_askar.so, aarch64-unknown-linux-gnu, true)	3m 48s
Build library (Android) (aarch64-linux-android)	2m 8s
Build library (linux-x86_64, ubuntu-latest, libaries_askar.so, x86_64-unknown-linux-gnu, true)	3m 34s
Build library (iOS) (aarch64-apple-ios)	5m 49s
Run tests (ubuntu-latest)	3m 9s
Build library (Android) (armv7-linux-androideabi)	2m 17s
Build library (darwin-universal, macos-latest, libaries_askar.dylib, darwin-universal, beta)	12m 55s
Build library (iOS) (aarch64-apple-ios-sim)	7m 46s
Run tests (macos-latest)	8m 19s
Build library (Android) (i686-linux-android)	2m 9s
Build library (windows-x86_64, windows-latest, aries_askar.dll, x86_64-pc-windows-msvc)	3m 48s
Build library (iOS) (x86_64-apple-ios)	6m 2s
Run tests (windows-latest)	4m 51s
Build library (Android) (x86_64-linux-android)	2m 12s
Create library (Android)	0s
Create iOS xcframework	1m 16s
Create iOS and Android release assets	0s
Build and test JavaScript wrapper	1m 3s
Build and test Python wrapper (linux-aarch64, 3.8)	20s
Build and test Python wrapper (linux-x86_64, 3.8)	24s
Build and test Python wrapper (darwin-universal, 3.8)	33s
Build and test Python wrapper (windows-x86_64, 3.8)	58s
Successful build	1s
	1h 16m 30s

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