Add epoch 67 (#573)

* Update files

* Update __init__

* Update changelog

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 #### Added
 
+- Add epoch 67 [#573](https://github.com/askap-vast/vast-tools/pull/573)
 - Add epoch 66 [#569](https://github.com/askap-vast/vast-tools/pull/569)
 - Add epochs 64 and 65 [#568](https://github.com/askap-vast/vast-tools/pull/568)
 - Support for Python 3.10 [#334](https://github.com/askap-vast/vast-tools/pull/334)
@@ -36,6 +37,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 #### List of PRs
 
+- [#573](https://github.com/askap-vast/vast-tools/pull/573): feat: Add epoch 67
 - [#569](https://github.com/askap-vast/vast-tools/pull/569): feat: Add epoch 66
 - [#567](https://github.com/askap-vast/vast-tools/pull/567): fix: Correctly calculate plot_lightcurve y-axis range for multi-frequency upper limits
 - [#568](https://github.com/askap-vast/vast-tools/pull/568): feat, docs: Add epochs 64 and 65, and fix new epoch addition docs page syntax

vasttools/__init__.py

@@ -78,6 +78,7 @@
     "64": "64",
     "65": "65",
     "66": "66",
+    "67": "67",
 }
 
 OBSERVED_EPOCHS = {