Update changelog with links to PRs/issues resolved

CHANGELOG.md

@@ -5,25 +5,25 @@ _**Version 1.3:**_
 **Enhancements**
 
 - Significant performance improvements for tracking [#89](https://github.com/climate-processes/tobac/pull/89)
-- Significant performance improvements for feature detection and segmentation #90
-- Performance improvement for `calculate_area` #93
-- Added ability to set a user defined stub cell value instead of `np.nan`. Default value is `-1` and stub cell values are now integers instead of floats by default #74
-- Added deprecation warnings for parameters `min_num` in feature detection and `d_min` in tracking, and added exceptions when multiple, incompatible parameters are given (e.g. `d_max` and `v_max`) #107
+- Significant performance improvements for feature detection and segmentation [#90](https://github.com/climate-processes/tobac/pull/90)
+- Performance improvement for `calculate_area` [#93](https://github.com/climate-processes/tobac/issues/93)
+- Added ability to set a user defined stub cell value instead of `np.nan`. Default value is `-1` and stub cell values are now integers instead of floats by default [#74](https://github.com/climate-processes/tobac/issues/93)
+- Added deprecation warnings for parameters `min_num` in feature detection and `d_min` in tracking, and added exceptions when multiple, incompatible parameters are given (e.g. `d_max` and `v_max`) [#107](https://github.com/climate-processes/tobac/pull/107)
 
 **Bug fixes**
 
-- Fixed level parameter in segmentation, as this previously had no effect #92
-- Remove `is` comparisons for string literals #99
-- Added missing `raise` for exception in `get_spacings` #105
-- Remove automatic setting of matplotlib backend to `agg` on import #100
-- Fix deprecation warnings for changed import paths in dependencies #110
+- Fixed level parameter in segmentation, as this previously had no effect [#92](https://github.com/climate-processes/tobac/pull/92)
+- Remove `is` comparisons for string literals [#99](https://github.com/climate-processes/tobac/pull/99)
+- Added missing `raise` for exception in `get_spacings` [#105](https://github.com/climate-processes/tobac/pull/105)
+- Remove automatic setting of matplotlib backend to `agg` on import [#100](https://github.com/climate-processes/tobac/pull/100)
+- Fix deprecation warnings for changed import paths in dependencies [#110](https://github.com/climate-processes/tobac/pull/110)
 
 **Documentation**
 
-- Added recommended python style #72
-- Updated author list and email addresses #109
+- Added recommended python style [#72](https://github.com/climate-processes/tobac/issues/72)
+- Updated author list and email addresses [#109](https://github.com/climate-processes/tobac/pull/109)
 
 **Repository enhancements**
 
-- Black formatting of all python code and formatting check in actions #78
-- Pre-commit hook for black formatting #96
+- Black formatting of all python code and formatting check in actions [#78](https://github.com/climate-processes/tobac/pull/78)
+- Pre-commit hook for black formatting [#96](https://github.com/climate-processes/tobac/pull/96)