doc: move CHANGELOG from doc/ to root directory

doc/CHANGELOG.md

@@ -1,22 +0,0 @@
-# Changelog
-
-This file is currently only a template for future use.
-
-Each change falls into one of the following categories: Added, Changed, Deprecated, Removed, Fixed or Security.
-
-## [Unreleased]
-
-### Changed
- - Enable modules schnorrsig, extrakeys and ECDH by default in ./configure
-
-### Deprecated
- - Deprecated context flags `SECP256K1_CONTEXT_VERIFY` and `SECP256K1_CONTEXT_SIGN`. Use `SECP256K1_CONTEXT_NONE` instead.
- - Renamed `secp256k1_context_no_precomp` to `secp256k1_context_static`.
-
-### Added
- - Added `secp256k1_selftest`, to be used in conjunction with `secp256k1_context_static`.
-
-## [MAJOR.MINOR.PATCH] - YYYY-MM-DD
-
-### Added/Changed/Deprecated/Removed/Fixed/Security
-- [Title with link to Pull Request](https://link-to-pr)

doc/release-process.md

@@ -1,7 +1,7 @@
 # Release Process
 
 1. Open PR to master that
-   1. adds release notes to `doc/CHANGELOG.md` and
+   1. adds release notes to `CHANGELOG.md` and
    2. if this is **not** a patch release, updates `_PKG_VERSION_{MAJOR,MINOR}` and `_LIB_VERSIONS_*` in `configure.ac`
 2. After the PR is merged,
    * if this is **not** a patch release, create a release branch with name `MAJOR.MINOR`.
@@ -11,4 +11,4 @@
      Also include the release note commit bump `_PKG_VERSION_BUILD` and `_LIB_VERSIONS_*` in `configure.ac`.
 4. Tag the commit with `git tag -s vMAJOR.MINOR.PATCH`.
 5. Push branch and tag with `git push origin --tags`.
-6. Create a new GitHub release with a link to the corresponding entry in `doc/CHANGELOG.md`.
+6. Create a new GitHub release with a link to the corresponding entry in `CHANGELOG.md`.