Add pyjanitor to ecosystem.rst

Author: topper-123

doc/source/ecosystem.rst

@@ -23,6 +23,21 @@ or `search pypi for pandas <https://pypi.org/search/?q=pandas>`_.
 We'd like to make it easier for users to find these projects, if you know of other
 substantial projects that you feel should be on this list, please let us know.
 
+.. _ecosystem.data_cleaning_and_validation:
+
+Data cleaning and validation
+----------------------------
+
+`pyjanitor <https://github.com/ericmjl/pyjanitor/>`__
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Pyjanitor provides a clean API for cleaning data, using method chaining.
+
+`Engarde <https://engarde.readthedocs.io/en/latest/>`__
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Engarde is a lightweight library used to explicitly state assumptions about your datasets
+and check that they're *actually* true.
 
 .. _ecosystem.stats:
 
@@ -329,18 +344,6 @@ Increasingly, packages are being built on top of pandas to address specific need
  * vaex.from_pandas
  * vaex.to_pandas_df
 
-
-.. _ecosystem.data_validation:
-
-Data validation
----------------
-
-`Engarde <https://engarde.readthedocs.io/en/latest/>`__
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Engarde is a lightweight library used to explicitly state your assumptions about your datasets
-and check that they're *actually* true.
-
 .. _ecosystem.extensions:
 
 Extension data types