Updating some plumbing

Release of 1.10.3

- 4dd89ae5a967cfec2fee06c83a6f098b3c6c3b44: chore: allow main as a branch on older version of nebula release plugin
- 9017c2c8f5f51ac2b4a94bb388f85ced78dfe5c7: Update README.adoc
- dbcc3acfeea43b1b2131528cea6c80a1c0f5d439: replace testCompile with testImplementation (#36)
- cb8e3211e199029c6bf6e5f81565bebdd746d77d: Update README.adoc

Kotlin 1.6.21, Ratpack 1.9.0

• Version upgrades
• Improved documentation
• Project moved into maintenance mode

ratpack 1.7.1

Release of 1.9.2

- a51ac5537c7b478468449493f09f588a505ff004: upgrade to ratpack 1.7.1

ratpack 1.7.0

Release of 1.9.0

- c9cb19a5c583d938ad38cea854e3731d75583aca: upgrade to ratpack 1.7.0

Updated kotlin and coroutines libraries

Release of 1.8.0

- edbf51de06f08c0cec19c11faf113f3b41081289: fix plugin to allow running kotlin script files
- ce9a7710e04643fbb1ade7b122a9694cb5a4ea0f: formatting
- 1cdaddf7bf4deb9b188d4d89a72697f038a3a096: upgrade to kotlin 1.3.41, coroutines 1.2.2, move example project

Ratpack 1.6.1, new kotlin versions, coroutine extensions

Release of 1.7.6

- 6000d1f7e6790a3445c6301af0a8647f52c1f6dc: adding a few more coroutine utilities, bumping versions

Remove suspend keyword

Release of 1.7.5

- 38d18c74ed0bbf8630b4ba3c078d1e708ea14b64: function doesnt need to be lazy
- 5c6406b30b7a15d56e307642518792ab5fd53be0: updating README

kotlin 1.3.21 and coroutines 1.1.1

Release of 1.7.4

- aabab10859e6b49b193af7dbe9e8c8faac14875f: kotlin 1.3.21 and coroutines 1.1.1

Kotlin 1.3.20

Release of 1.7.3

- 6de7cecb0d679626e2f9f81a5bcac7370f565c5f: kotlin 1.3.20 and coroutines 1.1.0

Ratpack 1.6.0

Release of 1.7.2

- 8800e20b260b62a0613afe9f0bb1ff0f2950e681: ratpack 1.6.0
- 3ad353fea270fda5cb9fcaddf88e5e626463add4: nebula kotlin 1.3.11
- b72902873d5c51ae8944574319986d6a2a212c36: ratpack 1.6.0-rc-4
- 189074d24d69f90fa6b6a5d8e971410399aeae45: kotlin 1.3.11 and ratpack 1.6.0-rc3
- 812c6dc3039102ba541ff1bb947d4c089ec6044a: upgrading dependencies again
- b0fa635d9ab1f5e1895f8a31ad729e3c6570c229: allow adding exec starter to deferred promise fork
- cae88c5d0883a787481f55b62b38a1ab0b8ea492: fixing spelling
- 6d65bb6abf29e39fc99cf118f7fcedcad1205baa: fixing test iteration length
- c06b3fe179c547f89644b2aa9ab8965dc932a045: better more concurrent
- 2d24586193adfcc8fdd6b3c8c415b67eddcfb644: allow parallel execution of promise-based coroutines
- afa3fceee0266814d8ea51887bdd8bb6b2eefa57: upgrade to gradle 5
- f5510a9215d5f4425ac785e34a2530a6d8f5930b: kotlin 1.3.10, ratpack 1.6.0 (#24)