DOC: Update changelog to include backported PRs

Author: effigies

doc/changelog/1.X.X-changelog.rst

@@ -1,3 +1,17 @@
+1.4.1 (To Be Determined)
+========================
+(`Full changelog <https://github.com/nipy/nipype/milestone/1.4.1?closed=1>`__)
+
+  * FIX: mapnode to generate result file when crashes in single node mode (https://github.com/nipy/nipype/pull/3143)
+  * FIX: Can't seem to import workflows from niflows in CircleCI (https://github.com/nipy/nipype/pull/3134)
+  * FIX: Repair aftermath of docs refactor (https://github.com/nipy/nipype/pull/3133)
+  * FIX: change ANTS number_of_time_steps from Float to Int (https://github.com/nipy/nipype/pull/3118)
+  * DOC: Revise generation of examples to work in RTD (https://github.com/nipy/nipype/pull/3132)
+  * DOC: Bring examples generation back to ``doc/conf.py`` (https://github.com/nipy/nipype/pull/3131)
+  * DOC: Documentation overhaul (https://github.com/nipy/nipype/pull/3124)
+  * DOC: Deep revision of documentation building (https://github.com/nipy/nipype/pull/3120)
+  * DOC: Deduplicate code for Sphinx's APIdoc generation (https://github.com/nipy/nipype/pull/3119)
+
 1.4.0 (December 20, 2019)
 =========================
 (`Full changelog <https://github.com/nipy/nipype/milestone/37?closed=1>`__)