* Readme update w.r.t new abseil-cpp dependency and fixing the absl-cpp version that we download.

* Reducing hash of commit to just working level

Currently, CMake is configured to download and build abseil from source
whenever `BUILD_GEOCODER` is set to `ON`. Let's allow users to use a
pre-existing installation of abseil by checking for one first before
attempting to download and build another one.

If CMake finds a pre-existing installation of abseil, it will use that
instead.

We need to allow the user to override `CMAKE_CXX_STANDARD` because they
may have built abseil with a newer standard than C++11. Attempting to
build libphonenumber with C++11 will fail if abseil was built with a
newer C++ standard.

Closes #2772.

A Ruby gem which plugs directly into Google's native C++ libphonenumber for extremely fast and robust phone number parsing, validation, and formatting. On average, most methods are 70x to 80x faster than other Ruby phone number libraries.

We've added a Salesforce port of this library written in Apex and adapted to Salesforce governor limits.

* Adding anchors for all FAQ entries (down to ###)

- Followup to PR #2773, where we started using official appengine Maven plugin than older ```maven-gae-plugin```
- ```appcfg``` script is deprecated and most of these works can be done through ```gcloud-appengine-sdk```
- More details in cl/333435946 (where we moved away from ```appcfg``` during the releases) and cl/xxxxx (We no more need any manual copy jar commands)

* Update CONTRIBUTING.md (we no longer accept metadata patches directly)

* Update making-metadata-changes.md

* Update making-metadata-changes.md

Co-authored-by: lararennie <lararennie@users.noreply.github.com>
Co-authored-by: Tijana Vislavski Gradina <tijanavg@google.com>

* [maven-release-plugin] prepare release v8.12.51

* [maven-release-plugin] prepare for next development iteration

* [maven-release-plugin] prepare release v8.12.50

* [maven-release-plugin] prepare for next development iteration

* Removing old generated files when building new ones

* Removing old generated files when building new ones

* Removing old generated files when building new ones

Co-authored-by: penmetsaa <penmetsaa@google.com>

* [maven-release-plugin] prepare release v8.12.49

* [maven-release-plugin] prepare for next development iteration

* Metadata updates for release 8.12.49
* Update Release Notes refarding new metadata resources

* [maven-release-plugin] prepare release v8.12.48

* [maven-release-plugin] prepare for next development iteration

* M2M documentation update after NL M2M range support in mobile category

* Update FAQ.md

* removing duplicate target links

* Adding dependencies at the right level

* [maven-release-plugin] prepare release v8.12.47

* [maven-release-plugin] prepare for next development iteration

This reverts commit 4f9dbce606.

* Revert "Metadata updates for release 8.12.47 (#2754)"

This reverts commit 4f9dbce606.

* Fix carrier and geocoding data file paths

It is used in the library with #2734, and not linking with it
breaks users of the library: https://bugs.debian.org/1008817

Co-authored-by: penmetsaa <penmetsaa@google.com>

* Added new classes with behavior from MetadataManager & MetadataSource

* Replaced MetadataManager usages with new classes

* New PrefixDataIOHandler which packs data into a jar

* Added mockito-core jar to lib folder

* Added mockito-all jar to lib folder and updated tests to not use junit4 annotations

* Fixed prefix generation entry points

* Specific exception for missing metadata cases

* Small change in checking missing metadata cases

* [maven-release-plugin] prepare release v8.12.46

* [maven-release-plugin] prepare for next development iteration

This very minor, trivial and risk free commit fix introduced in 8.12.45 with #2734
error: ignoring return value of function declared with 'warn_unused_result' attribute [-Werror,-Wunused-result]"
Without this fix, I cannot build using clang++13

* [maven-release-plugin] prepare release v8.12.45

* [maven-release-plugin] prepare for next development iteration