Use goreleaser to build and release (#244)

Instead of using gox on one side and an action to release, we can merge
them together with goreleaser which will build for extra targets (arm,
mips if needed in the future) and it also takes care of creating
checksums, a source archive, and a changelog and creating a release with
all the artifacts.

All binaries should respect the old naming convention, so any scripts
out there should still work.

Signed-off-by: Itxaka <igarcia@suse.com>

vendor/github.com/apex/log/History.md

@@ -1,4 +1,67 @@
 
+v1.9.0 / 2020-08-18
+===================
+
+  * add `WithDuration()` method to record a duration as milliseconds
+  * add: ignore nil errors in `WithError()`
+  * change trace duration to milliseconds (arguably a breaking change)
+
+v1.8.0 / 2020-08-05
+===================
+
+  * refactor apexlogs handler to not make the AddEvents() call if there are no events to flush
+
+v1.7.1 / 2020-08-05
+===================
+
+  * fix potential nil panic in apexlogs handler
+
+v1.7.0 / 2020-08-03
+===================
+
+  * add FlushSync() to apexlogs handler
+
+v1.6.0 / 2020-07-13
+===================
+
+  * update apex/logs dep to v1.0.0
+  * docs: mention that Flush() is non-blocking now, use Close()
+
+v1.5.0 / 2020-07-11
+===================
+
+  * add buffering to Apex Logs handler
+
+v1.4.0 / 2020-06-16
+===================
+
+  * add AuthToken to apexlogs handler
+
+v1.3.0 / 2020-05-26
+===================
+
+  * change FromContext() to always return a logger
+
+v1.2.0 / 2020-05-26
+===================
+
+  * add log.NewContext() and log.FromContext(). Closes #78
+
+v1.1.4 / 2020-04-22
+===================
+
+  * add apexlogs HTTPClient support
+
+v1.1.3 / 2020-04-22
+===================
+
+  * add events len check before flushing to apexlogs handler
+
+v1.1.2 / 2020-01-29
+===================
+
+  * refactor apexlogs handler to use github.com/apex/logs client
+
 v1.1.1 / 2019-06-24
 ===================