Added wscat tool to work with websockets

php_tools/wscat/README.md

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+# wscat
+
+WebSocket cat
+
+| Platform | Url                                                              |
+|----------|------------------------------------------------------------------|
+| NPM      | https://www.npmjs.com/package/wscat                              |
+| GitHub   | https://github.com/websockets/wscat                              |

php_tools/wscat/install.yml

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+---
+
+check: wscat --version | grep -E '[0-9][.0-9]+' || (wscat --version; false)
+
+all:
+  type: npm
+  package: wscat
+  binary: wscat
+  version:
+  build_dep: []
+  run_dep: []
+  pre:
+  post:

php_tools/wscat/options.yml

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+---
+
+# The name of the module
+name: wscat
+
+# Exclude module build/installation for the following PHP versions
+exclude: []
+
+# In order for this tool to build/install correctly,
+# the following tools must have been installed first.
+depends: []