zbase32 should have no padding

[internalG]

anybase32.decode(b'y', anybase32.ZBASE32)
Traceback (most recent call last):
File "", line 1, in
File "/Users/suwei/Documents/python3env/scrapy/lib/python3.6/site-packages/anybase32/init.py", line 102, in decode
return base64.b32decode(encoded)
File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/base64.py", line 246, in b32decode
raise binascii.Error('Incorrect padding')
binascii.Error: Incorrect padding

According to the paper https://philzimmermann.com/docs/human-oriented-base-32-encoding.txt no padding is a feature for zbase32.

[internalG]

and some test in paper is not good.

anybase32.decode(b'4t7ye', anybase32.ZBASE32)
b'\xd4z\x04'

#bits base-2 base32 base64 z-base-32

---

1 0 AA====== AA== y
1 1 QA====== gA== o
2 01 IA====== QA== e
2 11 QA====== gA== a
10 0000000000 AAAA==== AAA= yy
10 1000000010 QCAA==== gIA= on
20 10001011100010001000 BC4IQ=== CLiI tqre
24 111100001011111111000111 6C74O=== 8L/H 6n9hq
24 110101000111101000000100 2R5AI=== 1HoE 4t7ye
30 111101010101011110111101000011 HVK66QY= PVXvQw== 6im5sd