Update version and changelog

Bear with me, while I figure out the new release process here :)

CHANGELOG.md

@@ -1,35 +1,48 @@
-##  v1.4.0 / 2021-06-01
+## 1.5.1 / 2022-02-21
+
+* Bugfix release for the release process itself :)
+
+## 1.5.0 / 2022-02-21
+
+* move to prometheus-community
+* new build system and (hopefully) the docker namespace
+* some fan sensors that measure in "percent of maximum rotation speed" now show
+  up as fans (previously generic sensors)
+
+Thanks a lot to all the contributors and sorry for the long wait!
+
+## 1.4.0 / 2021-06-01
 
 * Includes a lot of refactoring under the hood
 * Add ability to customize the commands executed by the collectors - see the sample config for some examples.
 
-##  v1.3.2 / 2021-02-22
+## 1.3.2 / 2021-02-22
 
 * Fixes in the `bmc` collector for systems which do not support retrieving the system firmware revision (see #57)
 * Fix for sensors returning multiple events formatted as a string with questionable quoting (see #62)
 * Use latest go builder container for the Docker image
 
-##  v1.3.1 / 2020-10-22
+## 1.3.1 / 2020-10-22
 
 * Fix #57 - that's all :slightly_smiling_face:
 
-##  v1.3.0 / 2020-07-26
+## 1.3.0 / 2020-07-26
 
 * New `sm-lan-mode` collector to get the ["LAN mode" setting](https://www.supermicro.com/support/faqs/faq.cfm?faq=28159) on Supermicro BMCs (not enabled by default)
 * Added "system firmware version" (i.e. the host's BIOS version) to the BMC info metric
 * Update all dependencies
 
-##  v1.2.0 / 2020-04-22
+## 1.2.0 / 2020-04-22
 
 * New `sel` collector to get number of SEL entries and free space
 * Update all dependencies
 
-##  v1.1.0 / 2020-02-14
+## 1.1.0 / 2020-02-14
 
 * Added config option for FreeIPMI workaround-flags
 * Added missing documentation bits around `ipmi-chassis` usage
 * Updated dependencies to latest version
 
-##  v1.0.0 / 2019-10-18
+## 1.0.0 / 2019-10-18
 
 Initial release.

VERSION

@@ -1 +1 @@
-1.4.0
+1.5.1