Bump bundled libarchive version to 3.5.2

- Update bunlded libarchive version used on Windows/Mac
- Enable requested zstd support while we are at it. Closes #211

dependencies/zstd-1.5.0/build/single_file_libs/build_decoder_test.sh

@@ -0,0 +1,91 @@
+#!/bin/sh
+
+# Temporary compiled binary
+OUT_FILE="tempbin"
+
+# Optional temporary compiled WebAssembly
+OUT_WASM="temp.wasm"
+
+# Source files to compile using Emscripten.
+IN_FILES="examples/emscripten.c"
+
+# Emscripten build using emcc.
+emscripten_emcc_build() {
+  # Compile the the same example as above
+  CC_FLAGS="-Wall -Wextra -Wshadow -Werror -Os -g0 -flto"
+  emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM $IN_FILES
+  # Did compilation work?
+  if [ $? -ne 0 ]; then
+    echo "Compiling ${IN_FILES}: FAILED"
+    exit 1
+  fi
+  echo "Compiling ${IN_FILES}: PASSED"
+  rm -f $OUT_WASM
+}
+
+# Emscripten build using docker.
+emscripten_docker_build() {
+  docker container run --rm \
+    --volume $PWD:/code \
+    --workdir /code \
+    emscripten/emsdk:latest \
+    emcc $CC_FLAGS -s WASM=1 -I. -o $OUT_WASM $IN_FILES
+  # Did compilation work?
+  if [ $? -ne 0 ]; then
+      echo "Compiling ${IN_FILES} (using docker): FAILED"
+    exit 1
+  fi
+  echo "Compiling ${IN_FILES} (using docker): PASSED"
+  rm -f $OUT_WASM
+}
+
+# Try Emscripten build using emcc or docker.
+try_emscripten_build() {
+  which emcc > /dev/null
+  if [ $? -eq 0 ]; then
+    emscripten_emcc_build
+    return $?
+  fi
+
+  which docker > /dev/null
+  if [ $? -eq 0 ]; then
+    emscripten_docker_build
+    return $?
+  fi
+
+  echo "(Skipping Emscripten test)"
+}
+
+# Amalgamate the sources
+./create_single_file_decoder.sh
+# Did combining work?
+if [ $? -ne 0 ]; then
+  echo "Single file decoder creation script: FAILED"
+  exit 1
+fi
+echo "Single file decoder creation script: PASSED"
+
+# Compile the generated output
+cc -Wall -Wextra -Wshadow -Werror -Os -g0 -o $OUT_FILE examples/simple.c
+# Did compilation work?
+if [ $? -ne 0 ]; then
+  echo "Compiling simple.c: FAILED"
+  exit 1
+fi
+echo "Compiling simple.c: PASSED"
+
+# Run then delete the compiled output
+./$OUT_FILE
+retVal=$?
+rm -f $OUT_FILE
+# Did the test work?
+if [ $retVal -ne 0 ]; then
+  echo "Running simple.c: FAILED"
+  exit 1
+fi
+echo "Running simple.c: PASSED"
+
+# Try Emscripten build if emcc or docker command is available.
+try_emscripten_build
+
+exit 0