Convert @bugsnag/core/lib/node-fallback-stack to TypeScript#2447

AnastasiiaSvietlova merged 2 commits intointegration/typescriptbugsnag/bugsnag-js:integration/typescriptfrom

PLAT-13696-node-fallback-stackbugsnag/bugsnag-js:PLAT-13696-node-fallback-stackCopy head branch name to clipboard