Merge branch 'v1.5' of https://github.com/glific/glific into v1.5

Update mix.exs

update changelogs

fix appsignal error on invoices

add logs to get more details on the issue (glific#1432)

* add logs to get more details on the issue

* error while timeout

* credo fixes

* clenups

Feature/stripe updates (glific#1416)

* cleanups

* updating fields in stripe portal

* updating billing sync with stripe

* updating response handling

update ROADMAP

mix version

Merge pull request glific#1359 from glific/hotfix/update-language-con…

…tact

adding check for language for contact

Merge pull request glific#1342 from glific/frontend-changelog

Updated frontend change log for v1.3