Update license in all sub-packages to reflect top level license of Apache 2.0

[github-user-23]

Validating license change

Checked that there are no hits for

AFFERO

Checked that there are no hits for

GPLv3

Validating build

./setup.sh

Ran:

./watch.sh

Note there is a pre-existing error in watch output

@dendronhq/common-test-utils: ../../node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts(99,5): error TS2411: Property '[Symbol.unscopables]' of type '() => { copyWithin: boolean; entries: boolean; fill: boolean; find: boolean; findIndex: boolean; keys: boolean; values: boolean; }' is not assignable to 'symbol' index type 'CommentToken'.
@dendronhq/common-test-utils: 9:00:55 AM - Found 2 errors. Watching for file changes.

Was able to get the same exact error from origin/master

@dendronhq/common-test-utils: ../../node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts(99,5): error TS2411: Property '[Symbol.unscopables]' of type '() => { copyWithin: boolean; entries: boolean; fill: boolean; find: boolean; findIndex: boolean; keys: boolean; values: boolean; }' is not assignable to 'symbol' index type 'CommentToken'.
@dendronhq/common-test-utils: 9:02:41 AM - Found 2 errors. Watching for file changes.

Hence, deeming it as unrelated to this change.