fix: Add C++17 support

[dexterslabor]

Closes #69

[mrousavy]

Thanks for your PR, but what doesn't work without it?

[ayush-leap]

Thanks for your PR, but what doesn't work without it?

hi @mrousavy, we also faced the same issue which this PR fixes. Without this patch, we are unable to build the app on RN 0.75 + Expo 51. I added more details and stack trace on the issue here - #69 (comment)

It will helpful if you can look into it and merge it if it looks good. I'm unsure if c++17 or c++20 would break anything in the library, but the app got built successfully for me on c++20

[emenocal07]

Hi, same issue here @mrousavy , using react-native-bigumber 0.3.0 and RN 0.75.5

This PR solves the issue