ci: add ubuntu-latest test on ci,

OSX code corverage block on rust-lang/rust#63047, so add ubuntu support
advance

.github/workflows/grcov.yml

@@ -8,7 +8,7 @@ name: Code coverage with grcov
 
 jobs:
   grcov:
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
 
@@ -29,7 +29,7 @@ jobs:
           args: --all
         env:
           CARGO_INCREMENTAL: 0
-          RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests"
+          RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off"
 
       - name: Gather coverage data
         id: coverage

.github/workflows/main.yml

@@ -8,7 +8,7 @@ name: base check
 jobs:
   check:
     name: Check
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
         uses: actions/checkout@v1
@@ -26,7 +26,10 @@ jobs:
 
   test:
     name: Test Suite
-    runs-on: macos-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest]
     steps:
       - name: Checkout sources
         uses: actions/checkout@v1
@@ -45,7 +48,7 @@ jobs:
 
   rustfmt:
     name: rust code format style check
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
         uses: actions/checkout@v1
@@ -65,7 +68,7 @@ jobs:
           args: --all -- --check
 
   clippy_check:
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1

configs/grcov.config.yml

@@ -0,0 +1,10 @@
+branch: true
+ignore-not-existing: true
+llvm: true
+output-type: lcov
+output-file: ./lcov.info
+ignore:
+  - "/*"
+  - "../*"
+  - "**/main_thread_tests/**"
+  - "**/examples/**"