Changed ambigous date format to ISO

The changelog used am ambiguous date format (e.g. `dd-mm-yyyy`) which is understood only in a very [few countries](https://en.wikipedia.org/wiki/Date_format_by_country#Listing) in the world. The vast majority of software projects have standardized on the non-ambigious [ISO format](https://en.wikipedia.org/wiki/ISO_8601) (e.g. `yyyy-mm-dd`) which is not only used in changelogs but also for most other situations where dates or date times are needed. Please consider accepting this change as it will make reading the change log less confusing.


https://keepachangelog.com/en/1.0.0/

CHANGELOG.rst

@@ -31,15 +31,15 @@ Unreleased
 .. _#393: https://github.com/pypa/build/pull/393
 
 
-0.7.0 (16-09-2021)
+0.7.0 (2021-09-16)
 ==================
 
 - Add ``build.util`` module with an high-level utility API (`PR #340`_)
 
 .. _PR #340: https://github.com/pypa/build/pull/340
 
 
-0.6.0.post1 (05-08-2021)
+0.6.0.post1 (2021-08-05)
 ========================
 
 - Fix compatibility with Python 3.6 and 3.7 (`PR #339`_, Fixes `#338`_)
@@ -49,7 +49,7 @@ Unreleased
 
 
 
-0.6.0 (02-08-2021)
+0.6.0 (2021-08-02)
 ==================
 
 - Improved output (`PR #333`_, Fixes `#142`_)
@@ -73,7 +73,7 @@ Breaking Changes
 
 
 
-0.5.1 (22-06-2021)
+0.5.1 (2021-06-22)
 ==================
 
 - Fix invoking the backend on an inexistent output directory with multiple levels (`PR #318`_, Fixes `#316`_)
@@ -86,7 +86,7 @@ Breaking Changes
 
 
 
-0.5.0 (19-06-2021)
+0.5.0 (2021-06-19)
 ==================
 
 - Add ``ProjectBuilder.metadata_path`` helper (`PR #303`_, Fixes `#301`_)
@@ -111,7 +111,7 @@ Breaking Changes
 
 
 
-0.4.0 (23-05-2021)
+0.4.0 (2021-05-23)
 ==================
 
 - Validate that the supplied source directory is valid (`PR #260`_, Fixes `#259`_)
@@ -152,7 +152,7 @@ Breaking Changes
 
 
 
-0.3.1 (09-03-2021)
+0.3.1 (2021-03-09)
 ==================
 
 - Support direct usage from pipx run in 0.16.1.0+ (`PR #247`_)
@@ -164,7 +164,7 @@ Breaking Changes
 
 
 
-0.3.0 (19-02-2021)
+0.3.0 (2021-02-19)
 ==================
 
 - Upgrade pip based on venv pip version, avoids error on Debian Python 3.6.5-3.8 or issues installing wheels on Big Sur (`PR #229`_, `PR #230`_, Fixes `#228`_)
@@ -183,7 +183,7 @@ Breaking Changes
 
 
 
-0.2.1 (09-02-2021)
+0.2.1 (2021-02-09)
 ==================
 
 - Fix error from unrecognised pip flag on Python 3.6.0 to 3.6.5 (`PR #227`_, Fixes `#226`_)
@@ -193,7 +193,7 @@ Breaking Changes
 
 
 
-0.2.0 (07-02-2021)
+0.2.0 (2021-02-07)
 ==================
 
 - Check dependencies recursively (`PR #183`_, Fixes `#25`_)
@@ -231,7 +231,7 @@ Breaking changes
 
 
 
-0.1.0 (29-10-2020)
+0.1.0 (2020-10-29)
 ==================
 
 - Moved the upstream to PyPA
@@ -259,7 +259,7 @@ Breaking changes
 
 
 
-0.0.4 (08-09-2020)
+0.0.4 (2020-09-08)
 ==================
 
 - Packages are now built in isolation by default
@@ -275,31 +275,31 @@ Breaking changes
 
 
 
-0.0.3.1 (10-06-2020)
+0.0.3.1 (2020-06-10)
 ====================
 
 - Fix bug preventing the CLI from being invoked
 - Improved documentation
 
 
 
-0.0.3 (09-06-2020)
+0.0.3 (2020-06-09)
 ==================
 
 - Misc improvements
 - Added documentation
 
 
 
-0.0.2 (29-05-2020)
+0.0.2 (2020-05-29)
 ==================
 
 - Add setuptools as a default fallback backend
 - Fix extras handling in requirement strings
 
 
 
-0.0.1 (17-05-2020)
+0.0.1 (2020-05-17)
 ==================
 
 - Initial release