Added github config for tests, issues, and funding

Author: erezsh

.github/FUNDING.yml

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+# These are supported funding model platforms
+
+github: lark-parser
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+A clear and concise description of what the bug is, and what you expected to happen.
+
+**To Reproduce**
+
+Provide a short script that reproduces the erroneous behavior.
+
+If that is impossible, provide clear steps to reproduce the behavior.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Suggestion**
+Provide a clear and concise description of what the problem is, and what you would like to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/other.md

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+---
+name: Other
+about: For any discussion that doesn't fit the templates
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+

.github/ISSUE_TEMPLATE/question.md

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+---
+name: Question
+about: Ask a question about Lark or request help
+title: ''
+labels: question
+assignees: ''
+
+---
+
+**What is your question?**
+
+Try to be accurate and concise.
+
+**If you're having trouble with your code or grammar**
+
+Provide a small script that encapsulates your issue.
+
+Explain what you're trying to do, and what is obstructing your progress.

.github/workflows/tests.yml

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+name: Tests
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9, 3.10.0-rc - 3.10, pypy3]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Download submodules
+        run: |
+          git submodule update --init --recursive
+          git submodule sync -q
+          git submodule update --init
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r test-requirements.txt
+      - name: Run tests
+        run: |
+          python -m tests