Restore plugin example to working state

The current example depended on a very old Slither version, and
triggered an error due to its empty description, URL, etc. Add
example values so the detector can be run.

plugin_example/setup.py

@@ -1,14 +1,14 @@
 from setuptools import setup, find_packages
 
 setup(
-    name="slither-my-plugins",
+    name="slither_my_plugin",
     description="This is an example of detectors and printers to Slither.",
     url="https://github.com/trailofbits/slither-plugins",
     author="Trail of Bits",
     version="0.0",
     packages=find_packages(),
     python_requires=">=3.8",
-    install_requires=["slither-analyzer==0.1"],
+    install_requires=["slither-analyzer>=0.6.0"],
     entry_points={
         "slither_analyzer.plugin": "slither my-plugin=slither_my_plugin:make_plugin",
     },

plugin_example/slither_my_plugin/detectors/example.py

@@ -11,12 +11,12 @@ class Example(AbstractDetector):  # pylint: disable=too-few-public-methods
     IMPACT = DetectorClassification.HIGH
     CONFIDENCE = DetectorClassification.HIGH
 
-    WIKI = ""
+    WIKI = "https://www.example.com/#example-detector"
 
-    WIKI_TITLE = ""
-    WIKI_DESCRIPTION = ""
-    WIKI_EXPLOIT_SCENARIO = ""
-    WIKI_RECOMMENDATION = ""
+    WIKI_TITLE = "example detector"
+    WIKI_DESCRIPTION = "This is an example detector that always generates a finding"
+    WIKI_EXPLOIT_SCENARIO = "Scenario goes here"
+    WIKI_RECOMMENDATION = "Customize the detector"
 
     def _detect(self):