FIX: Backport circleci configuration from develop

.circleci/config.yml

@@ -0,0 +1,65 @@
+---
+version: 2
+jobs:
+  build:
+    docker:
+      - image: ubuntu:18.04
+    steps:
+      - checkout
+      - run:
+          name: Add vala-team/ppa
+          command: |
+            apt update
+            apt install -y software-properties-common gnupg
+            add-apt-repository ppa:vala-team/ppa -y
+      - run:
+          name: Install dependencies
+          command: apt update
+            && apt install -y
+              clang
+              cmake
+              libconfig-dev
+              libgtest-dev
+              libopus-dev
+              libsodium-dev
+              libvpx-dev
+              pkg-config
+              libgee-0.8-dev
+              libgspell-1-dev
+              libgtk-3-dev
+              libjson-glib-dev
+              libsoup2.4-dev
+              libsqlcipher-dev
+              libcanberra-dev
+              libgstreamer1.0-dev
+              libgstreamer-plugins-base1.0-dev
+              valac
+              python3-pip
+              wget
+      - run:
+          name: Install meson
+          command: pip3 install meson ninja
+      - run:
+          name: Build and install toxcore
+          command: |
+            wget "https://github.com/TokTok/c-toxcore/archive/v0.2.8.tar.gz"
+            tar -xzf v0.2.8.tar.gz
+            cd c-toxcore-0.2.8
+            cmake -DCMAKE_INSTALL_PREFIX=/usr
+            make
+            make install
+            cd ..
+      - run:
+          name: Configure
+          command: meson build
+      - run:
+          name: Build
+          command: ninja -C build
+      - run:
+          name: Test
+          command: ninja -C build test
+workflows:
+  version: 2
+  build:
+    jobs:
+      - build