refactor: some add, refactor, changes in pyproject.toml file

* Adds requires-python tag/attributes which helps users+build_tool/pip to find minimum version supported
* Changes version constraint from exact to lowest version supported to be used

Author: thePromger

pyproject.toml

@@ -5,6 +5,7 @@ build-backend = "maturin"
 [project]
 name = "robyn"
 version = "0.72.0"
+requires-python = ">=3.9"
 description = "A Super Fast Async Python Web Framework with a Rust runtime."
 authors = [{ name = "Sanskar Jethi", email = "sansyrox@gmail.com" }]
 license = { file = "LICENSE" }
@@ -24,17 +25,17 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
 ]
 dependencies = [
-  "inquirerpy == 0.3.4",
-  "multiprocess == 0.70.14",
-  "orjson == 3.11.0",
-  "rustimport == 1.3.4",
+  "inquirerpy >= 0.3.4",
+  "multiprocess >= 0.70.14",
+  "orjson >= 3.11.0",
+  "rustimport >= 1.3.4",
   # conditional
-  "uvloop~=0.21.0; sys_platform != 'win32' and platform_python_implementation == 'CPython' and platform_machine != 'armv7l'",
-  "watchdog == 4.0.1",
+  "uvloop >= 0.21.0; sys_platform != 'win32' and platform_python_implementation == 'CPython' and platform_machine != 'armv7l'",
+  "watchdog >= 4.0.1",
 ]
 
 [project.optional-dependencies]
-"templating" = ["jinja2 == 3.0.1"]
+"templating" = ["jinja2 >= 3.0.1"]
 
 [project.urls]
 Documentation = "https://robyn.tech/"
@@ -48,19 +49,19 @@ test_server = "integration_tests.base_routes:main"
 
 [dependency-groups]
 dev = [
-  "black==23.1",
-  "commitizen==2.40",
-  "isort==5.11.5",
-  "maturin==0.14.12",
-  "pre-commit==2.21.0",
-  "ruff==0.1.3",
+  "black >= 23.1",
+  "commitizen >= 2.40",
+  "isort >= 5.11.5",
+  "maturin >= 0.14.12",
+  "pre-commit >= 2.21.0",
+  "ruff >= 0.1.3",
 ]
 test = [
-  "nox==2023.4.22",
-  "pytest==7.2.1",
-  "pytest-codspeed==1.2.2",
-  "requests==2.28.2",
-  "websocket-client==1.5.0",
+  "nox >= 2023.4.22",
+  "pytest >= 7.2.1",
+  "pytest-codspeed >= 3.0.0",
+  "requests >= 2.28.2",
+  "websocket-client >= 1.5.0",
 ]