Update dependency on my fork of pymp4

It may look like I'm downgrading, but I'm not.

1.5.0 was an incorrect version bump based on TrueDread's fork. v1.4.0 is the next release after, even though it's a lower version. v1.4.0 should be used instead.

poetry.lock

@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.4.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
 
 [[package]]
 name = "aiohttp"
@@ -1398,14 +1398,14 @@ iso8601 = "*"
 
 [[package]]
 name = "rlaphoenix-pymp4"
-version = "1.5.0"
-description = "A Python parser for MP4 boxes"
+version = "1.4.0"
+description = "Python parser for MP4 boxes"
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+python-versions = ">=3.7,<4.0"
 files = [
-    {file = "rlaphoenix_pymp4-1.5.0-py2.py3-none-any.whl", hash = "sha256:2309389dd6087519a1eed8b148d586b5d7f12c9210c8f588b0aa623827d75d35"},
-    {file = "rlaphoenix_pymp4-1.5.0.tar.gz", hash = "sha256:6aaa85a0503c22f8acb0ea1b334c6ad69c3f0591e78520453b0404648d5629f6"},
+    {file = "rlaphoenix_pymp4-1.4.0-py3-none-any.whl", hash = "sha256:dbe15f8b5721066b497dd853393e4a8ee28c2ade1656901128e965bb9a575bd5"},
+    {file = "rlaphoenix_pymp4-1.4.0.tar.gz", hash = "sha256:aca6094782e4ba8cbfa0f131a892dd97c15eb4db14802bc8b42fc43698512d13"},
 ]
 
 [package.dependencies]
@@ -1745,4 +1745,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9.0,<3.12"
-content-hash = "83608be51420040e95fd8981f7dc774cb60a6db1145a70ad0ed2b08d29bf56f6"
+content-hash = "0f23d2cc6ed4e674aba0e1e8775b53d41a053143016cf38d4c91ed2ace4e724f"

pyproject.toml

@@ -44,7 +44,7 @@ PyYAML = "^6.0"
 requests = { extras = ["socks"], version = "^2.28.2" }
 rich = "^13.3.1"
 "rlaphoenix.m3u8" = "^3.4.0"
-rlaphoenix-pymp4 = "^1.5.0"
+rlaphoenix-pymp4 = "^1.4.0"
 "ruamel.yaml" = "^0.17.21"
 sortedcontainers = "^2.4.0"
 subtitle-filter = "^1.4.4"