Update default [black].version to 21.8b0 (#12718)

Author: asherf

src/python/pants/backend/python/lint/black/lockfile.txt

@@ -4,19 +4,16 @@
 #
 # --- BEGIN PANTS LOCKFILE METADATA: DO NOT EDIT OR REMOVE ---
 # {
-#   "requirements_invalidation_digest": "780cba6ad935672d12257fe859963f13a175acadffc3163b1e4aac6f9296b7d9",
+#   "requirements_invalidation_digest": "1ba5f97d92f33b13e0cd56a960380fa6f616fae215d715ddd7a7ebf99795c890",
 #   "valid_for_interpreter_constraints": [
 #     "CPython>=3.6.2"
 #   ]
 # }
 # --- END PANTS LOCKFILE METADATA ---
 
-appdirs==1.4.4; python_full_version >= "3.6.2" \
-    --hash=sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128 \
-    --hash=sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41
-black==21.5b2; python_full_version >= "3.6.2" \
-    --hash=sha256:e5cf21ebdffc7a9b29d73912b6a6a9a4df4ce70220d523c21647da2eae0751ef \
-    --hash=sha256:1fc0e0a2c8ae7d269dfcf0c60a89afa299664f3e811395d40b1922dff8f854b5
+black==21.8b0; python_full_version >= "3.6.2" \
+    --hash=sha256:2a0f9a8c2b2a60dbcf1ccb058842fb22bdbbcb2f32c6cc02d9578f90b92ce8b7 \
+    --hash=sha256:570608d28aa3af1792b98c4a337dbac6367877b47b12b88ab42095cfc1a627c2
 click==8.0.1; python_version >= "3.6" and python_full_version >= "3.6.2" \
     --hash=sha256:fba402a4a47334742d782209a7c79bc448911afe1149d07bdabdf480b3e2f4b6 \
     --hash=sha256:8c04c11192119b1ef78ea049e0a6f0463e4c48ef00a30160c704337586f3ad7a
@@ -35,6 +32,9 @@ mypy-extensions==0.4.3; python_full_version >= "3.6.2" \
 pathspec==0.9.0; python_full_version >= "3.6.2" \
     --hash=sha256:7d15c4ddb0b5c802d161efc417ec1a2558ea2653c2e8ad9c19098201dc1c993a \
     --hash=sha256:e564499435a2673d586f6b2130bb5b95f04a3ba06f81b8f895b651a3c76aabb1
+platformdirs==2.3.0; python_version >= "3.6" and python_full_version >= "3.6.2" \
+    --hash=sha256:8003ac87717ae2c7ee1ea5a84a1a61e87f3fbd16eb5aadba194ea30a9019f648 \
+    --hash=sha256:15b056538719b1c94bdaccb29e5f81879c7f7f0f4a153f46086d155dffcd4f0f
 regex==2021.8.28; python_full_version >= "3.6.2" \
     --hash=sha256:9d05ad5367c90814099000442b2125535e9d77581855b9bee8780f1b41f2b1a2 \
     --hash=sha256:f3bf1bc02bc421047bfec3343729c4bbbea42605bcfd6d6bfe2c07ade8b12d2a \
@@ -77,9 +77,9 @@ regex==2021.8.28; python_full_version >= "3.6.2" \
     --hash=sha256:ed283ab3a01d8b53de3a05bfdf4473ae24e43caee7dcb5584e86f3f3e5ab4374 \
     --hash=sha256:610b690b406653c84b7cb6091facb3033500ee81089867ee7d59e675f9ca2b73 \
     --hash=sha256:f585cbbeecb35f35609edccb95efd95a3e35824cd7752b586503f7e6087303f1
-toml==0.10.2; python_full_version >= "3.6.2" \
-    --hash=sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b \
-    --hash=sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f
+tomli==1.2.1; python_version >= "3.6" and python_full_version >= "3.6.2" \
+    --hash=sha256:8dd0e9524d6f386271a36b41dbf6c57d8e32fd96fd22b6584679dc569d20899f \
+    --hash=sha256:a5b75cb6f3968abb47af1b40c1819dc519ea82bcc065776a866e8d74c5ca9442
 typed-ast==1.4.3; python_version < "3.8" and python_full_version >= "3.6.2" \
     --hash=sha256:2068531575a125b87a41802130fa7e29f26c09a2833fea68d9a40cf33902eba6 \
     --hash=sha256:c907f561b1e83e93fad565bac5ba9c22d96a54e7ea0267c708bffe863cbe4075 \
@@ -111,7 +111,7 @@ typed-ast==1.4.3; python_version < "3.8" and python_full_version >= "3.6.2" \
     --hash=sha256:209596a4ec71d990d71d5e0d312ac935d86930e6eecff6ccc7007fe54d703808 \
     --hash=sha256:9c6d1a54552b5330bc657b7ef0eae25d00ba7ffe85d9ea8ae6540d2197a3788c \
     --hash=sha256:fb1bbeac803adea29cedd70781399c99138358c26d05fcbd23c13016b7f5ec65
-typing-extensions==3.10.0.2; python_version < "3.8" and python_full_version >= "3.6.2" and python_version >= "3.6" \
+typing-extensions==3.10.0.2 \
     --hash=sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7 \
     --hash=sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34 \
     --hash=sha256:49f75d16ff11f1cd258e1b988ccff82a3ca5570217d7ad8c5f48205dd99a677e

src/python/pants/backend/python/lint/black/subsystem.py

@@ -26,7 +26,7 @@ class Black(PythonToolBase):
     options_scope = "black"
     help = "The Black Python code formatter (https://black.readthedocs.io/)."
 
-    default_version = "black==21.5b2"
+    default_version = "black==21.8b0"
     default_main = ConsoleScript("black")
 
     register_interpreter_constraints = True