Test update (#114)

* fix : minor edit in tests

* doc : CHANGELOG updated

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Test system modified
 ## [0.6] - 2022-04-13
 ### Added
 - `save_params_filter` function

test/overall_test.py

@@ -57,6 +57,7 @@ True
 >>> g.plot(projection=Projection.POLAR, color=(.1, .2, .8))
 >>> g.plot(bgcolor=(.1, .2, .8), spot_size=0.1)
 >>> g.plot(size=(20, 20))
+>>> g.plot(alpha=0.5, linewidth=2.2)
 >>> result = g.nft_storage(api_key="")
 >>> result['status']
 False
@@ -169,6 +170,7 @@ False
 [1]
 >>> g_ = GenerativeImage()
 >>> del(g)
+>>> del g_.data1
 >>> del(g_)
 >>> os.remove("test.png")
 >>> os.remove("test2.png")