MNT: Update changelog

Author: effigies

doc/changelog/1.X.X-changelog

@@ -6,6 +6,8 @@
   * FIX: Make positional arguments to LaplacianThickness require previous argument (https://github.com/nipy/nipype/pull/2848)
   * FIX: Import math and csv modules for bids_gen_info (https://github.com/nipy/nipype/pull/2881)
   * FIX: Ensure outputs can be listed in camino.ProcStreamlines by defining instance variable (https://github.com/nipy/nipype/pull/2739)
+  * ENH: Allow afni.MaskTool to take multiple input files (https://github.com/nipy/nipype/pull/2892)
+  * ENH: Add flags dictionary input to spm.Level1Design (https://github.com/nipy/nipype/pull/2861)
   * ENH: Threshold stddev once only in TSNR (https://github.com/nipy/nipype/pull/2883)
   * ENH: Add workbench.CiftiSmooth interface (https://github.com/nipy/nipype/pull/2871)
   * DOC: Replace initialism typo in comment with intended phrase (https://github.com/nipy/nipype/pull/2875)