refactor: move header to include subdir

docs: add PlatformIO example integration to README.md

README.md

@@ -30,6 +30,25 @@ CXXFLAGS += $(CFLAGS) -std=gnu++17
 ###### Manual<sub>**_B_**</sub>
 Fetch repository, copy [`src/cronos.h`](src/cronos.h) into your project, add `#include "cronos.h"` to your sources.
 
+###### PlatformIO
+For bare-metal applications using `platformio.ini`, add the following to `lib_deps` for your environment:
+
+```ini
+[env]
+lib_deps =
+    https://github.com/ardnew/cronos.git#v0.2.0
+```
+
+For library project  using `library.json`, add the following to "dependencies":
+
+```json
+{
+  "dependencies": {
+    "ardnew/cronos": "^0.2.0"
+  }
+}
+```
+
 ###### Arduino
 This [library](library.properties) conforms to the [Arduino Library Specification (1.5)](https://arduino.github.io/arduino-cli/0.34/library-specification/). Install using the Library Manager via [IDE](https://github.com/arduino/arduino-ide) (or [GUI](https://github.com/arduino/Arduino)) or with command `arduino-cli lib install cronos` using the [CLI](https://github.com/arduino/arduino-cli).
 

library.json

@@ -1,7 +1,8 @@
 {
   "name": "cronos",
-  "keywords": "timer, chrono, std, std::chrono, tick, ticks, uptime, clock, c++17, constexpr, library",
+  "version": "0.2.0",
   "description": "A std::chrono wrapper for target system's native tick count.",
+  "keywords": "timer, chrono, std, std::chrono, tick, ticks, uptime, clock, c++17, constexpr, library",
   "homepage": "https://github.com/ardnew/cronos",
   "authors": [
     {
@@ -16,11 +17,14 @@
     "url": "https://github.com/ardnew/cronos.git"
   },
   "license": "MIT",
-  "version": "0.1.6",
+  "frameworks": "*",
+  "platforms": "*",
+  "dependencies": {},
   "headers": [
     "cronos.hpp"
   ],
   "build": {
-    "flags": "-std=c++17"
+    "unflags": [ "-std=gnu++11", "-std=gnu++14" ],
+    "flags": [ "-std=c++17" ]
   }
 }