github-ci: add Tarantool 2.10

Add Tarantool 2.10 [1] to testing matrix, it is a first release with
datetime support. Tarantool 2.9 has been removed, it was never
published [2].

setup-tarantool action does not support new Tarantool release policy
[3], and Tarantool 2.10 is installed without action but using curl and
apt. New issue to fix this has been submitted [4].

1. https://www.tarantool.io/en/doc/latest/release/2.10.0/
2. https://www.tarantool.io/en/doc/latest/release/calendar/
3. tarantool/setup-tarantool#19
4. #186

Needed for #118

Author: ligurio

.github/workflows/testing.yml

@@ -31,7 +31,7 @@ jobs:
         tarantool:
           - '1.10'
           - '2.8'
-          - '2.9'
+          - '2.10'
           - '2.x-latest'
         coveralls: [false]
         fuzzing: [false]
@@ -48,8 +48,8 @@ jobs:
       - name: Clone the connector
         uses: actions/checkout@v2
 
-      - name: Setup Tarantool ${{ matrix.tarantool }}
-        if: matrix.tarantool != '2.x-latest'
+      - name: Setup Tarantool ${{ matrix.tarantool }} (< 2.10)
+        if: matrix.tarantool != '2.x-latest' && matrix.tarantool != '2.10'
         uses: tarantool/setup-tarantool@v1
         with:
           tarantool-version: ${{ matrix.tarantool }}
@@ -60,6 +60,12 @@ jobs:
           curl -L https://tarantool.io/pre-release/2/installer.sh | sudo bash
           sudo apt install -y tarantool tarantool-dev
 
+      - name: Setup Tarantool 2.10
+        if: matrix.tarantool == '2.10'
+        run: |
+          curl -L https://tarantool.io/tWsLBdI/release/2/installer.sh | bash
+          sudo apt install -y tarantool tarantool-dev
+
       - name: Setup golang for the connector and tests
         uses: actions/setup-go@v2
         with: