auto: increment master version to 15.0.131

fix(common/core): incxstr checks all character while incrementing 

auto: increment master version to 15.0.130

chore: Add link to SIL

chore: Add CONTRIBUTING documentation

Co-authored-by: Darcy Wong <darcy_wong@sil.org>

Co-authored-by: Darcy Wong <darcy_wong@sil.org>

chore: Create CODE_OF_CONDUCT.md

Based on the GitHub template; I have reviewed this and don't think I see any issues. At present, @mcdurdin and @darcywong00 will be responsible for maintenance of community standards through the email address listed in this document.

auto: increment master version to 15.0.129

fix(ios): move sentry settings responsibility to build agent

The build agent already has the relevant `SENTRY_` environment variables
set in order to complete builds for all projects. Thus, we should
exclude these values from the xcode build. However, we need to ensure
that the `SENTRY_URL` and `SENTRY_ORG` variables are imported into the
xcode environment from the build agent environment.

auto: increment master version to 15.0.128

chore(web): disable registerstub test

auto: increment master version to 15.0.127

chore: sentry.io dsn 👮‍♂️

See #5799.

auto: increment master version to 15.0.126

chore(linux): Update changelog files for 14.0.282 🍒 

fix(web): popup positioning 🎩

feat(developer): touch layout testing 🎩

fix(android/engine): Remove unnecessary permissions from Manifest

auto: increment master version to 15.0.125