fix compilation with newer clang (#5)

all: run `v fmt -w .` in project root

all: fix case in GitHub URL

c: fix removing specific watch, if using multiple watches

all: update `dmon.h` to septag/dmon@a56fdb9

c: remove unused `.clang_format` and `test.c`

feat: update `v.mod` to allow installation via `v install` cli (#3)

all: run `v fmt -w .` to update the attributes to the new syntax (#2)

docs: update `README.md` with thread and blocking info, use new example

all: update `dmon.h` to septag/dmon@c1b6377, move old example to test, add new example that blocks input

all: fix errors and warnings <= V 0.4.2 a2dabdd

all: make compatible with V v0.3.2, fix warnings, fix example

all: merge master

all: update to work with latest V

readme: remove stray markdown bullet point