improvements to readme, types and docs

improvements to readme, types and docs

• simplify build flow
• disable LTO and use default flags instead (should work on AWS lambda now)
• fix typings typo
• fix license typo
• create test workflow with github actions
• update readme
• update package.json
• update eslint

• simplify build flow
• disable LTO and use default flags instead (should work on AWS lambda now)
• backport minor fixes from v2.10.3-3

• minor type fixes 5c85127
• update readme + spell check bda5afe
• minor fix from swisseph dev e507adf
• correctly initialize error strings 0aa9d5e

v2.10.3-1...v2.10.3-2

• minor type fixes 57e3dcc
• update readme + spell checking c64ea12
• correctly initialize error strings b71a1cc

v2.10.0-7...v2.10.0-8

updated swiss ephemeris to version 2.10.03 which includes the following changes:

• function swe_lun_eclipse_when() missed lunar eclipses between the years 766 and 987 CE. 74 out of 506 eclipses were missed.
• function swe_pheno now has a better model to compute the Moon's magnitude when it is near the Sun. Magnitude does not refer to the size, but the how bright it appears. The change was proposed by Victor Reijs.

v2.10.2-4...v2.10.3-1

• correct typings c11f5b6

v2.10.2-3...v2.10.2-4

• correct typings and docs 9467f67

v2.10.0-6...v2.10.0-7

• fix house_name