Bump minimum requirement of nitro to 0.31.2 (peerDeps only)

[wh201906]

Required for #976
I tested the new minimum nitro version with corresponding nitrogen/generated code and it works.

[wh201906]

The min nitro requirement actually doesn't work well. It seems like the files under packages/react-native-quick-crypto/nitrogen/generated are generated with nitrogen v0.33.2, and they are incompatible with nitro v0.29.1/v0.31.2. The devDependencies/peerDependencies/generated code should use the same nitro version I guess.

[wh201906]

and they are incompatible with nitro v0.29.1/v0.31.2

For example, the generated CipherArgs.hpp requires NitroModules/PropNameIDCache.hpp

react-native-quick-crypto/packages/react-native-quick-crypto/nitrogen/generated/shared/c++/CipherArgs.hpp

Lines 25 to 29 in 7b9c096

	#if __has_include(<NitroModules/PropNameIDCache.hpp>)
	#include <NitroModules/PropNameIDCache.hpp>
	#else
	#error NitroModules cannot be found! Are you sure you installed NitroModules properly?
	#endif

but It is available after v0.32.0, which is higher than the min nitro requirement in peerDependencies
mrousavy/nitro@c942637
Users who pinned nitro to a version under v0.32.0 can get the build errors when using RNQC, even if the min nitro requirement stated in RNQC's package.json is v0.29.1/v0.31.2

This PR is still valid because it doesn't make things worse and it is indeed required for #976. The compatibility issue is kinda out of the scope of this PR. I don't know if it's a rare compatibility issue of nitrogen or it is designed so.