Migrate from LGTM.com to GitHub code analysis (#361)

* Migrate from LGTM.com to GitHub code analysis

LGTM.com is being deprecated and replaced by GitHub code analysis:
https://github.blog/2022-08-15-the-next-step-for-lgtm-com-github-code-scanning/

* Remove the deprecated `.lgtm.yml` configuration file.
* Initialize a configuration file `.github/workflows/codeql-analysis.yml`
  using the template provided in the GitHub Action documentation:
  https://github.com/github/codeql-action#usage

* Migrate from LGTM.com to GitHub code analysis

LGTM.com is being deprecated and replaced by GitHub code analysis:
https://github.blog/2022-08-15-the-next-step-for-lgtm-com-github-code-scanning/

* Adapt the template in `.github/workflows/codeql-analysis.yml` to this
  specific package.

* Add tomli, setuptools might need it to parse TOML

Author: DimitriPapadopoulos

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,62 @@
+name: "Code Scanning - Action"
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    #        ┌───────────── minute (0 - 59)
+    #        │  ┌───────────── hour (0 - 23)
+    #        │  │ ┌───────────── day of the month (1 - 31)
+    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        *  * * * *
+    - cron: '22 2 * * 5'
+
+jobs:
+  CodeQL-Build:
+    # CodeQL runs on ubuntu-latest, windows-latest, and macos-latest
+    runs-on: ubuntu-latest
+
+    permissions:
+      # required for all workflows
+      security-events: write
+
+      # only required for workflows in private repositories
+      actions: read
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: python
+          # languages: python, cpp
+          # queries: +security-extended
+
+      # Autobuild attempts to build any compiled languages (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below).
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following
+      #    three lines and modify them (or add more) to build your code if your
+      #    project uses a compiled language
+
+      #- run: |
+      #     make bootstrap
+      #     make release
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2

.lgtm.yml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=40.8.0", "wheel", "Cython", "py-cpuinfo"]
+requires = ["setuptools>=40.8.0", "setuptools_scm[toml]>=6.2", "Cython", "py-cpuinfo"]
 build-backend = "setuptools.build_meta:__legacy__"
 
 [tool.codespell]