chore: upgrade dev dependency floors and lock to latest versions

Bump dev dependency floors to match actual major versions in use:
- pytest >=8 -> >=9 (required by pytest-httpx >=0.36)
- pytest-httpx >=0.35 -> >=0.36
- pytest-asyncio >=0.25 -> >=1
- pytest-cov >=6 -> >=7
- ruff >=0.9 -> >=0.15

Lock file upgraded:
- certifi 2026.2.25 -> 2026.4.22
- idna 3.11 -> 3.13
- packaging 26.0 -> 26.1
- pytest-httpx 0.36.0 -> 0.36.2
- ruff 0.15.9 -> 0.15.11
- ty 0.0.29 -> 0.0.32

Author: splch

pyproject.toml

@@ -36,22 +36,22 @@ Issues = "https://github.com/ionq/ionq-core-python/issues"
 
 [project.optional-dependencies]
 dev = [
-    "pytest>=8",
-    "pytest-httpx>=0.35",
-    "pytest-asyncio>=0.25",
-    "pytest-cov>=6",
-    "ruff>=0.9",
+    "pytest>=9",
+    "pytest-httpx>=0.36",
+    "pytest-asyncio>=1",
+    "pytest-cov>=7",
+    "ruff>=0.15",
     "ty",
     "pdoc>=16",
 ]
 
 [dependency-groups]
 dev = [
-    "pytest>=8",
-    "pytest-httpx>=0.35",
-    "pytest-asyncio>=0.25",
-    "pytest-cov>=6",
-    "ruff>=0.9",
+    "pytest>=9",
+    "pytest-httpx>=0.36",
+    "pytest-asyncio>=1",
+    "pytest-cov>=7",
+    "ruff>=0.15",
     "ty",
     "pdoc>=16",
 ]