Don't build ancient OSX Sierra artifacts

.travis.yml

@@ -57,13 +57,10 @@ matrix:
 
  - name: "OSX clang: +static"
    os: osx
-   # Use an older image to disable syslog and for broader compatibility
-   # with old and new osx versions.
-   osx_image: xcode9.2
    compiler: clang
-   env: LINKAGE=static HOMEBREW_NO_AUTO_UPDATE=1
+   env: LINKAGE=static
    before_script:
-    - ./configure --install-deps --disable-lz4-ext --prefix="$PWD/dest" --enable-static --disable-syslog --enable-strip
+    - ./configure --install-deps --disable-lz4-ext --prefix="$PWD/dest" --enable-static --enable-strip
 
  - name: "Windows MinGW-w64 Dynamic"
    if: tag IS PRESENT

CHANGELOG.md

@@ -6,9 +6,11 @@ librdkafka v1.8.2 is a maintenance release.
 
  * The `librdkafka.redist` 1.8.0 package had two flaws:
    - the linux-arm64 .so build was a linux-x64 build.
-   - the included MSVC 140 runtimes for x64 were infact x86.
+   - the included Windows MSVC 140 runtimes for x64 were infact x86.
    The release script has been updated to verify the architectures of
    provided artifacts to avoid this happening in the future.
+ * Prebuilt binaries for Mac OSX Sierra (10.12) and older are no longer provided.
+   This affects [confluent-kafka-go](https://github.com/confluentinc/confluent-kafka-go).
 
 ## Enhancements